All posts by Alexander Gloy

High Frequency Trading – Around the World in 0.13 Seconds

We look at the following points:

  1. What is “High Frequency Trading”
  2. What is not “High Frequency Trading”
  3. US Market Structure
  4. Where is Wall Street?
  5. First Encounter with an Algorithm
  6. It’s a man’s machines’ world
  7. The “SIP” versus Direct Feed
  8. Race for Speed, Bandwidth and Computing Power
  9. Flash Crashes
  10. Share Buy-Backs
  11. Are Stock Prices Representative?
  12. Conclusions

US Macro Report – April 2017

Is the US economy heading into a recession?

Most investors won’t know until it is too late. The National Bureau of Economic Research (NBER) declares beginning and end of recessions, but often with a delay of more than a year.

The Economic Cycle Research Institute (ECRI) famously called a recession in September 2011 which never materialized.

The Federal Reserve Bank System calculates a recession probability based on only four indicators (payrolls, industrial production, real personal income and real sales). Those data are prone to revisions.

Lighthouse has developed its own 13-factor recession probability indicator. Instead of fixed thresholds it uses ranges, and weighs each indicator based on timeliness and accuracy.

The Lighthouse Recession Probability Indicator provides early warning signals, yet has not made any false positive calls when backtested to 1971.

US Macro Report – April 2017

What the hell just happened – Part 2

Part 2

(for part 1, please look here)

At the beginning of part 1, I offered three theories to explain what happened on global stocks markets, culminating in the flash crash of August 24, 2015:

  1. Flash-crash induced by high-frequency traders and panic-covering of short positions in volatility products
  2. US and China mutually crashing each other’s stock markets in an escalating financial war over AIIB (Asian Infrastructure Investment Bank, a competitor to the IMF) and SDR (Special Drawing Rights, the IMF’s virtual currency)
  3.  The appreciation of the Chinese Yuan versus other Asian currencies hurt Chinese exports and forced the PBoC to devalue the Yuan. This has caused the end of the largest carry-trade in history.

Chinese Stock Market Crash

I initially thought I could brush aside theory #2 pretty quickly. But then I read the following:

Citadel suspended - Hunsader

Citadel, based in Chicago, is one of the largest hedge funds in the world. It masquerades as a market maker, executing 13% of all US stock market and 20% of all US option trading volume. It can safely be called a high-frequency trading firm.

Furthermore, China curbed trading in futures of the country’s prominent market indices, the CSI 300 and CSI 500. Trading volume in CSI 300 futures declined by 99% (!):

CSI 300 futures


Earlier in July, many stocks listed in China were suspended from trading (peaking at 71% on July 8th):

Chinese stocks halted

There were reports of short sellers being imprisoned, portfolio managers being carted away for “re-education” and journalists being forced to apologize for reporting on the Chinese stock market.

Take a look at a 20-year chart of the Shanghai Stock Exchange Composite Index:

SSEC 2015-09-08

Was the Chinese stock market in a bubble? Clearly. Has short-selling and high-frequency trading “helped” making the crash worse? Probably.

As an aside, consider the growth in Chinese GDP over the same period (in USD):

China GDP 1995-2015It went approximately 10-fold. Stocks didn’t do much, except for two bubbles (which quickly deflated). Most investors didn’t make any money in a country with one of the strongest growth rates over the past two decades.

Chinese Economy: Serious Slowdown

On August 8, Chinese July export data missed expectations by declining 8.3% (-1% expected). The weakness persisted in August (-5.5%). What happened?

  1. Chinese wages have risen substantially. Over the past 7 years, monthly minimum wages in Shanghai increased from CNY 690 to 2,020 (+16% per annum). Over the same period, average yearly wages in manufacturing have increased from CNY 15,750 to 51,500 (+22% per annum). Some US companies have moved labor-intensive production back to home (“reshoring”).
  2. The Chinese Yuan, due to a soft peg, has not moved much against the US Dollar. However, most other currencies fell against the Dollar. This meant the Yuan appreciated against currencies of competing export countries in Asia (and customer countries in Europe):

Asian FX 2015-09-10

  • A strong Yuan makes Chinese products less competitive abroad. No wonder exports began to stutter. Additionally, Chinese company margins are getting squeezed from rising labor costs.
  • China was coerced into letting its currency appreciate in exchange for its entry into WTO (World Trade Organization):

History of Yuan

  •  Foreign Direct Investment (FDI), capital inflows and a large positive trade balance led to a growing positive current account balance:

China current account to GDP

  • This enabled China to become the largest foreign holder of US Treasury securities:

Foreign holders of US Treasury securities

  • However, capital flows recently reversed:

China capital flows

Two reasons:

  1. Wealthy Chinese trying to bring some of their legally or illegally (bribery, crime) acquired wealth abroad. Australian house prices have doubled over the past decade driven by Chinese buying.
  2. Speculators and hedge funds used to bet on continued appreciation of the Yuan versus the Dollar. It is said to be the largest “carry trade” in history, estimated to have reached up to $3 trillion. In a carry trade, an investor borrows money in a low-yielding currency (USD, Euro or Yen) and investing the proceeds into a higher-yielding one (Yuan, with interest rates between 5.25% and 7.5% over much of the past decade). Usually, interest rate differentials between currencies are being “lost” once you try to lock in your gain by selling forward contracts. However, forward rates in the Chinese Yuan were higher than spot prices as investors expected further appreciation. Carry traders not only benefitted from interest rate differential, but also from currency appreciation on top. You could borrow, for example, Dollars at 1%, buy Yuan, invest at 5%, and get some price appreciation on top. Leveraged a modest 10 times and you could show your investors annual returns of 40-50% without much volatility or draw-down. Every hedge-fund managers’ dream.

All dreams end at some point, and so did this one.

On August 11, the (more freely traded) offshore Yuan began dropping against the USD after the PBoC (People’s Bank of China, China’s central bank) allowed its price to fall (upwards move in chart means weaker Yuan):

CNY offshore 2015-08-12

  • The Yuan devaluation came as a shock to most market participants.
  • Equities and currencies began moving, initially contained, then culminating in a waterfall-like movement on Monday, August 24:

SPX 2015-08-24 month

  • The Shanghai Stock Exchange Composite Index (SSEC) fell 4% on Friday before the flash crash, 8% on Monday and another 8% on Tuesday for a three-day loss of 19%.
  • The Japanese Yen strengthened from 124 JPY/USD to 116.
  • Remarkably, the Euro also rallied, from 1.10 to 1.17.
  • This is an indication of large carry trades being unwound. Yen and Euro had been borrowed (thanks to low interest rates) and sold short. Unwinding those trade meant to buy back Yen and Euros.


Chinese Yuan: Ambushed Ambitions

A five percent devaluation does not seem significant – unless this was just the beginning. Back in 1994, China devalued the Yuan by roughly one third. This put pressure on other Asian currencies, eventually leading to the Asian crisis 1997/98:

CNY since 1980

All signs point towards a repeat of a larger devaluation. Not because the PBoC wants to devalue, but rather because it cannot prevent the Yuan from falling. Take a look at foreign currency reserves (mostly USD) at the PBoC:

Chinese FX reserves 2015-08

Reserves peaked at a little over $4 trillion in June 2014. Since then, reserves declined by over $450bn. August alone saw a decline of $94bn. So with a slightly positive trade balance, capital outflows must be even larger. The PCoC is intervening to support the Yuan (buying Yuan, selling Dollars). This causes Dollar reserves to fall.

The PBoC will not watch its reserves flying out of the door for too long. Eventually, the pressure will become too high. So how do you devalue? Trying a pro-rated withdrawal just invites speculators to bet on further weakness. You have to do it overnight. Go large or go home. Carry traders will lose their shirt.

The PBoC is at the other end of the carry trade. It is long the (low-yielding) Dollar, and short (higher-yielding) Yuan. A negative interest spread on $4trn of reserves is costing the PBoC $200bn a year. By devaluing its currency by, say, 25%, the central bank “makes” roughly $1trn (as its remaining Dollar reserves appreciate in Yuan).

Chinese Prime Minister Li recently complained that the decline in commodity prices lowered China’s income from tariffs, putting its finances under pressure. He also stated that the Yuan devaluation was prompted by weakness in other currencies.

In July, China switched towards reporting FX reserves (and gold, by the way) on a monthly basis (previously: quarterly). The PBoC has adopted the IMF’s “Special Data Dissemination Standard” (SDDS), a step likely done in good faith.

The Chinese have refrained from competitive devaluation for more than 20 years, motivated by WTO accession and potential inclusion of the Yuan in the SDR (Special Drawing Rights) currency basket. This was expected to happen the end of 2015. However, on August 4th, the IMF announced the Yuan would not be included at this time (allegedly since SDR users have requested more time to prepare for such a move – a bogus excuse in my view). With the IMF removing the SDR “carrot” at the last moment, China does no longer feel obligated to adhere to fairplay. A new round of competitive devaluations in Asia and Latin America seems unavoidable.

Possible ramifications for Emerging Markets:

  • Emerging Market (EM) central banks try to defend their currencies by selling dollars and rising interest rates, thereby throwing their economies into recession
  • A drop in EM currency leads to bankruptcy of companies with unhedged debt in foreign currency (usually US Dollar)
  • Drop in EM currency leads to imported inflation, cutting into domestic demand, possibly leading to social unrest
  • EM borrowers lose access to bond markets. Even otherwise
  • Exports from Developed Markets (DM) into EM suffer. DM Companies close loss-making foreign subsidiaries, take write-downs
  • DM banks have to write-down EM loans
  • A global recession ensues


Privilege of Reserve Currency

  • China is not alone in losing FX reserves; Russia has lost about half (from roughly $600bn to 300bn):

Russian FX Res 2015-07

  • Foreign exchange reserves are falling everywhere; even Algeria is down to $159bn at the end of June from 179bn at the end of 2014.
  • Some of the decline, at least for oil-exporting countries, seems to be linked to the decline in oil prices. Less Dollars coming in while same amount of Dollars going out for essential imports.
  • One theory goes as far as saying that the US is not interested in low, but rather high oil prices, as this would boost foreign demand for US Dollars. This in turn would enable the US to run a large current account deficit without negative repercussions on its exchange rate.
  • The game would be over once oil-exporting countries stop pricing oil exports in US Dollars. China plans to introduce a Yuan-based oil price benchmark, which will compete with Brent and West Texas Intermediate (WTI).

It is no secret China (and many others) are not happy with the US Dollar (and therefore the US) dominating our monetary system. Almost all commodities are exclusively priced in US Dollars. What at first sight seems like a convenience turns out to be one of the keys to world dominance. Advantages of the US Dollar being the world’s reserve currency:

  • The US will always be able to buy commodities, as it can print the currency to be delivered in exchange
  • Countries not using the US Dollar will have to acquire US Dollars first before being able to pay for, say, crude oil. This creates a demand for Dollars of around four billion dollars per day alone from oil consumption (assumed consumption in non-USD countries of 80m barrels per day x $50 per barrel).
  • Central banks of oil-exporting countries are forced to absorb those Dollars and become captive investors in US Treasury securities.
  • Countries pegging their currencies to the US Dollar are forced to buy Dollars if the US runs an expansive monetary policy and floods markets with Dollars. Buying Dollars means selling its own currency. This expands monetary supply, which can lead to inflation. The US thereby can export inflation. Detrimental effects of US monetary policy pop up abroad.
  • Algeria, for example, is not able to sell its oil in its own currency. Where would, say, Italy get those Dinars from? The market in Algerian Dinar is not big enough. Hence Algeria prices its oil in Dollars, and accumulates them at the central bank. Why not in Euros? Most countries that tried to price their oil in anything other than the Dollar have experienced sudden appearance of F-16’s in their skies.
  • US goods make up only six percent of Turkish imports. However, 60% of its imports are priced in US Dollars. Since the end of 2012, the Turkish Lira dropped 35% against the Dollar. From the perspective of a Turkish importer, the Dollar rose from 1.78 to 3.03, or 70%. If 60% of your imports go up by 70% will get you inflation (around 7% for now). Turkey’s consumer price index went from 200 in 2012 to 260 (+30%). This (normally) forces the central bank to raise interest rates, just at a time when the economy slows down. If the central bank tries to support the exchange rate by purchasing Turkish Lira (and selling Dollars) it make matters worse by shrinking the monetary base. Should it run out of Dollars to sell, the country may become unable to pay for imports or service any Dollar-denominated debt. Turkish companies with (unhedged) foreign currency debt positions will see their credit rating downgraded and might default on their debt. In short: total mayhem.

Emerging Markets in Turmoil

  • Look at Emerging Markets currencies:

EM FX 2015-09-09

  • This is a full-blown Emerging Market crisis. Strangely enough, the crisis has not yet reached those nations’ foreign currency government bonds.
  • Meanwhile, sovereign ratings are under pressure:

EM ratings 2015-09

  • USD-denominated Brazil government bond yields jumped from 5.5% to 6% after the country’s rating was reduced to ‘junk’ by S&P on September 9th.
  • How low can the Turkish Lira fall? There is no limit. The Turkish Lira, as all other currencies, are not backed by anything but trust (in the country’s central bank, political and social stability, demographics, foreign debt, overall debt, current account, capital flows, etc).
  • Russia, the US’s old foe, is not only forced to accumulate Dollars. Those Dollars remain on an account as a US bank (in the name of the Russian Central Bank). In order to earn a tiny bit on those Dollars, Russia invests in US Treasury securities, thereby helping to finance the US budget deficit (and the most expensive military in the world).
  • Russia is selling oil and gas in exchange for IOU’s (“I owe you”) from its greatest enemy. It can’t even sell its Treasury securities all at once. The Federal Reserve could simply refuse to execute their sell order.
  • Compare this to the effect of a strong or weak Dollar on the US: only 16% of US GDP are imports. It pays to be large. Avocados sold from California to New York do not constitute external trade.
  • Since the last crisis (1998) EM borrowing in USD has grown exponentially from $2 trillion to almost $10 trillion:

USD credit to non-US non-banks

  • EM bulls point towards large foreign exchange reserves as reason why this crisis will not be a repeat of 1997/98. However, those reserves are melting away fast. The build-up in debt eclipses central bank FX reserves by far.
  • In the past, elevated debt levels in EM were able to be “cured” by strong GDP growth. With population growth and productivity growth slowing down, there is no such hope.

Future Monetary System

  • Many non-US countries are fed up with the dominance of the US Dollar (and, as a consequence, the USA).
  • The past has seen many world reserve currency come and go, like empires:

Reserve Currency status does not last forever

  • According to one theory, a reserve currency eventually destroys itself as large current account deficits are required to supply the world with currency.
  • Once the US Dollar loses its role as reserve currency, who could take over? The Euro?
  • The Euro-zone counts 333 million citizens and a GDP of $13 trillion (US: 321m / $17trn). The EU has grown towards 508 million citizens and more than $18 trillion in GDP. It has eclipsed the US in potential economic power (but lacks military power).
  • US Dollar and Euro make up 85% of all world reserve currencies. There is no other currency left large enough to assume that function:

World FX Res IMF 2015-Q1

  • I initially assumed the Euro could assume the role of reserve currency. However, the Euro area has a current account surplus, meaning more money is coming in then going out (at least at current exchange rates). That would make it difficult to provide enough Euros to the rest of the world. There would be a constant shortage of Euros. Unless the ECB started buying foreign assets in exchange for Euros (which I doubt).
  • The future of our international monetary system is unclear. According to a plan by the IMF, all domestic currencies would be abolished and replaced by its currency, the SDR. Control of the monetary system would be completely out of reach of any democratically elected governments.
  • China seems to expect significant changes in the near future. It encourages its citizens to buy gold. According to Peter Hambro, Petropavlovsk Chairman and co-founder, 1,700 tonnes of gold worth USD 65 billion have been physically withdrawn from the Shanghai Gold Exchange in the twelve months leading to August 2015. The amount is more than half of the world’s annual gold mine supply. According to one theory, this is to protect its citizens from a large devaluation of the Yuan (gold price would rise in Yuan).


Can the Federal Reserve Raise Rates?

  • The Federal Open Market Committee (FOMC, the body that decides over monetary policy) will meet September 16-17. Fed watchers are divided over what will be the outcome.
  • After years of zero-interest-rate policy the Federal Reserve urgently wants to raise interest rates. Why? If and when the next recession hits, the Fed cannot lower rates if rates are already at zero percent.
  • Can the Fed raise rates? Of course it can. But would it matter? Only if some banks were actually borrowing from the Fed, right? Look at the latest balance sheet:

Fed assets 2015-07

(The * indicates amounts of less than 500 million; 241m to be exact)

  • Nobody is borrowing from the Fed. So how does it want to influence interest rates?
  • The Fed determines an upper and lower limit for the Fed Funds Rate (currently 0% and 0.25%). Banks trade reserve balances at the Fed among each other. They negotiate the rate at which one bank with excess reserves lends some of its balance to a bank in need of reserves. The weighted average across all transactions is the so-called “Federal Funds Effective Rate” (currently at 0.14%).
  • Before US banks borrow from the Fed they will use their excess reserves parked at the Fed. Look at the Fed’s liabilities (and its meagre capital of 58bn or 1.3% of total assets, resulting in leverage of 76 times):

Fed liabilities 2015-07

  • Banks have deposited $2.6 trillion with the Fed. Of those, $2.5 trillion are in excess of reserve requirements. The Fed does not pay any interest on those reserves (and earns a huge spread by investing those funds into Treasury securities).
  • Given that much excess supply, why would the Effective Fed Funds Rate go up?
  • The Fed is aware of this problem. It created a few new tools (reverse repo; would take too much time to explain).
  • As the Fed has over-supplied the market with liquidity it might find itself now unable to control short-term interest rates via a lending rate. It might have to try to do so via a deposit rate. However, offering interest on deposits at the Fed would compete with other institutions (like Money Market Mutual Funds). It could lead to unwanted side-effects.

Should the Fed Raise Rates?

  • IMF and World bank publicly urge the Fed to postpone rate hikes. That is remarkable. They would have had the option to do so privately. But they chose to go public. This makes it more difficult for the Fed to postpone, because it could be seen as giving in to political pressure. On the other hand, the situation in Emerging Markets must be really dire for IMF and World Bank to resort to public pressure.
  • There are two fears: 1 – raising rates would make the Dollar even stronger and escalate weakness of EM currencies (unless their central banks raise rates, too), and 2 – global debt has reached a level where higher interest rates cannot be extracted from productive assets without bankrupting the system.
  • However, a lot of Dollar strength has already been anticipated, as seen in this chart of the Dollar Index (a mix of major currencies):

USD Index 2015-09-11


  • My personal view is the Fed should not hike rates as the US economy seems to be slowing down. If the Fed raised rates now it might be forced to back down a few months later and reverse course, hurting credibility.
  • The ECB infamously raised rates just before the financial crisis 2008. The rate hikes in 2011 had to be corrected shortly thereafter, too:

ECB refinancing rate

What Will the Fed Do?

  • Probably some combination of a limited increase in short-term rates combined with another round of “Quantitative Easing” (bond purchases).
  • The Fed might also give guidance on what it plans to do with maturing bonds in its portfolio. Reinvesting those assets or letting the portfolio “run off”? At a minimum, I would expect reinvestment.
  • More extreme versions would include the declaration of a yield cap on Treasury bonds (“we will buy any bonds with yields of 2% or higher). Treasury bond yields would immediately drop below 2%, probably without much buying needed by the Fed. But the Fed wants to buy a lot of assets (in order to pump money into the economy), so this might not be the best approach.
  • The Fed could begin buying foreign assets, although this would be considered a hostile act by other central banks and constitute an escalation of currency wars.
  • The federal government could announce another fiscal stimulus plan (just in time for the 2016 presidential election). Believe it or not, the federal fiscal primary deficit has shrunk to 0.3% of GDP:

US fiscal and primary deficit 2015-06


How will markets react?

  • It might not even matter what the Fed announces next week, as long as market participants believe that the Fed has their back and will prevent the economy from falling apart (despite the fact the Fed wasn’t able to do so in 2008/9).
  • According to rumors, the Fed helped create a certain “Plunge Protection Team” (PPT), a non-recourse credit line given to a stealth buyer of stocks at the lows of the market in 2009. The PPT could have been selling stocks ahead of FOMC meetings, leading to a drop, then buying back after the news release.
  • Market participants, seeing rising stock and bond prices, assume that what the Fed does was “good” for stocks / bonds (even if it might do nothing for the real economy). It’s all about perception.

Longer-term Outlook

  • Once the dust settles, problems in Emerging Markets, currency devaluations and downgrades of sovereign and corporate credits will take the upper hand again.
  • Volatility and market crashes are like earthquakes – very hard to predict. Long periods of calm suddenly erupt into mayhem. It almost seems as if during long periods of calm stress builds up, almost silently. People get used to the calm, and erect fragile buildings. ZIRP (zero-interest-rate policy) by central banks has suppressed volatility over the past years. Handing out cheap loans to almost anyone with a pulse is all but a guarantee for things blowing up once conditions turn less favorable.

VIX 20 years

  • Was the spike in volatility (to 53, highest in past 20 years with exception of 2008/9) already this year’s earthquake, or simply a tremor ahead of the “big one”? Impossible to tell. Given the state of Emerging Markets I believe the “big one” is yet to come. If the Fed hikes, a crisis will follow. If it doesn’t, the inevitable will only be delayed.

What the hell just happened? Part 1

Part 1

Most of the year, the S&P 500 Index traded sideways in a narrow range (+- 3% from end of 2014). Then, suddenly, this:

SPX 2015-09-02

The German DAX-Index had been up 26% by April, but had to give up all of its gains:

DAX 2015-09-02

A measurement of expected volatility, the VIX-Index, surged to the highest level since 2009:

VIX 2015-09-02

Seemingly out of the blue, something has rattled markets. But what happened? There was no major bankruptcy, or disappointing company results, or nasty surprises on the macro front. The Fed keeps pushing out its first rate hike further and further; the IMF is actually begging the Fed to delay any rate hikes until 2016.

I have three theories to offer:

  1. Flash-crash induced by high-frequency traders and panic-covering of short positions in volatility products
  2. US and China mutually crashing each other’s stock markets in an escalating financial war over AIIB and SDR
  3.  The appreciation of the Chinese Yuan versus other Asian currencies hurt Chinese exports and forced the PBoC to devalue the Yuan. This has caused the end of the largest carry-trade in history.

If #1, then the market should recover quickly. If #2 or #3, then more trouble lies ahead. Let’s look at the details. This write-up got a bit long, so I will deal with #2 and 3 in a separate post.

The Flash Crash of August 24


In the three days leading to the flash crash on Monday, August 24, US equity markets begin losing ground:

SPX 20days 2015-09-02

After many months of being subdued, observed and implied volatility of options suddenly spikes from 12 to over 50 in the matter of hours. That made options, both calls and puts, suddenly much more expensive:

VIX 20days 2015-09-02


Small Excursion into Volatility

(You may skip this paragraph)

What does implied volatility mean? It’s not a concept that is easily understood by casual investors. Let me try to explain.

Let’s say there are two stocks, Boring Inc and Exciting Inc., both trading at $100. You believe their stock prices will go up. You buy call options giving you the right to buy each at a strike price of $103.

Boring Exciting Inc

Despite the fact that both stocks start trading at $100 and end at $102, the call options on “Exciting Inc” will most likely be more expensive than those of “Boring Inc”. Why? The share price of “Exciting Inc” is simply more volatile; it has larger swings. That increases the likelihood of the share price moving above the strike price ($103) during the lifetime of the option. For the owner of options in “Boring Inc” it never made sense to exercise his option (buy at $103) since the share price never exceeded that level. It doesn’t matter that both stocks ended at the same price ($102). Everything else equal, options on volatile stocks are worth more than options on boring stocks.

At an implied volatility of 16 you would be paying a fair price for an option if the stock price had moves larger than 1% (16 divided by square root of 256 trading days) on one third of trading days (33.3% = one sigma). Ergo, the stock price should move less than 1% on the remaining two thirds of days.

It is impossible to know in advance on how much a stock will move in the future. But the price of an option today has an imbedded assumption on its future swings, hence the name implied volatility. You can then make a wild guess and say “this stock is never going to move more than 3% on at least 10 days in September” and not buy (and rather sell) that option.

Looking back, you can measure volatility. It’s nothing else than the standard deviation. It’s then called historic, or observed volatility (as opposed to implied, or expected volatility embedded in option prices).

Increased levels of volatility make both calls and puts more expensive. Hence those who wish to protect their portfolio from losses (by purchasing puts) suddenly are facing higher costs.

Back to the main story:

August 24, 2015

On Monday morning, Chinese equities are selling off. The Shanghai Composite Index loses 8.5%. US equity futures are limit down (-5%) even before Wall Street opens. For the first time in history, trading in all four major US stock market futures (S&P 500, Dow Jones, Nasdaq-100 and Russell 2000) is being halted. That means stock prices have to begin trading without knowing where the fair price relative to futures would be. Arbitrage or hedging via futures is impossible.

The New York Stock Exchange (NYSE) imposes “rule 48”, which allows stocks to open promptly without price indications. Still, many stocks and ETF’s listed on the NYSE open only after delays of up to 30 minutes (see red line below; compare to blue line on a ‘normal’ day):

Delayed opening by number of symbols 2015-08-24

Nothing instills more panic among investors than not being able to sell. The CBOE (Chicago Board of Options Exchange) was unable to compute the VIX index for the first 30 minutes “since it was too volatile” (talk about irony):

VIX intraday 2015-08-24


Meanwhile, ETF’s (exchange-traded funds) on volatility were trading, without knowing where the underlying (VIX index) was. Over the first 30 minutes, more than 5 million shares of UVXY (ProShares Ultra VIX Short Term Futures ETF) and more than 30 million shares of VXX (iPath S&P 500 VIX Short-Term Futures ETN) were traded:

UVXY 2015-08-24


As you can see above, the UVXY ETF almost tripled in price in less than 5 days. You might not be aware of the “special features” of this ETF. Since inception in 2012 its price had fallen from (split-adjusted) $210,000 (yes, as in a fifth of a million) to $24:

UVXY since 2012

Or, if you prefer a logarithmic scale:

UVXY since 2012 log

So it is the perfect example of a “wasting asset”. Still, $300m of investor’s money sits in this ETF (and $1bn in its brother VXX). What do speculators do with such a loyal wasting asset? They short it. Or sell calls on it. Yes, you can trade options on a levered ETF on a future on the expected standard deviation of options on an index of stocks. It’s a derivative to the fifth power.

The volume in options traded on VXX and UVXY was larger on Friday, August 21st (the trade day before) than on the actual Flash Crash. Which is unusual. These charts show volume up to Friday, August 28th (so the Flash Crash is the fifth volume bar from the right):

UVXY option volume 2015-08-21 higher than on crash day

VXX option volume 2015-08-21 higher than on crash day

Also, the assets under management in a different, short-volatility ETF (XIV) doubled to more than $1bn in the week before the 24th:

Short vol ETF AuM increase

By shorting (or writing calls) on a wasting asset you can pick up small, but decent amounts of money every month. But when it goes wrong, you can lose a ton if you cannot cover your trade. The saying “picking up pennies in front of a steam roller” applies. Is this what caused the Flash Crash? Not by itself (the amounts involved are too small), but it probably aggravated the situation.

Blue Chips Can Flash-Crash, Too

Something else happened: dozens of blue chip stocks flash-crashed, too. And not too timid (many -20% to over -50%):

F to 10.44 - 2015-08-24 - was 15 on 8-19 - 50bn mkt cap - 150bn EV HCA flash crash 2015-08-24 KKR flash crash 2015-08-24 AAPL flash crash 2015-08-24 LVS flash crash 2015-08-24 GE flash crash 2015-08-24 PEP flash crash 2015-08-24

GE (General Electric) has a market capitalization of $250bn (and enterprise value of more than $500bn). Pepsi 135bn. Ford 50bn. Those companies’ share prices were ripped apart like ragdolls by a pitbull. And this is the largest and most sophisticated equity market in the world?

If you had stop-loss orders in the market, you were taken to the cleaners. And if you wanted to buy some stock, many online broker websites were unreachable.

Carnage in ETF World

You are a “passive” investor and only have ETF’s? If you thought those were safe from flash crashes, look at these charts:

SYLD Cambria Shareholder Yield ETF 2015-08-24 PKW Buyback achievers ETF 2015-08-24 USMV 2015-08-24 SPLV 2015-08-24 RSP flash crash 2015-08-24 DIA flash crash 2015-08-24 SPY flash crash 2015-08-24 QQQ flash crash 2015-08-24


Among those ETF’s are the largest in the world (SPY). Those are not some speculative niche ETF’s. The Guggenheim S&P 500 Equal-Weight (RSP) was almost cut in half! You can see how its price kept falling despite multiple trading halts (a trading halt gives traders an opportunity to rethink their orders). And there was volume.

Volume speaks volumes

August 24th was a special day in many ways. First, the volume in stock market futures was simply off-the-chart:

Number of trades SPX futures new record 2015-08-24

Two million S&P 500 futures changed hands. Each contract equals 250 times index value, which adds up to [2m x 250 x 1,900 =] $950bn. Insane.

It gets better.

You’d think that with record volume there would be record liquidity. Wrong. Liquidity in the e-mini S&P 500 futures (1/5th of the size of its big brother) during the critical opening minutes of Wall Street was the lowest since at least 2009 (black line):

E-mini liquidity 2015-08-24


The lines represent the depth of book in number of contracts (y-axis) at any given time during the trading day (x-axis), color-coded by date (blue = oldest). The lower, the less liquidity.

What does this mean? A lot of the “liquidity” you see on “normal” days is bogus. The large majority of orders is posted by machines (or high-frequency traders, HFT), only to be withdrawn at the slightest sign of turmoil (when you needed them most).

Another interesting observation is the number of trades within the first ten seconds of trading:

Trades within first 10 seconds of trading 2015-08-24

However, the average trade size (number of shares traded per trade, here in the S&P 500 ETF), reached a historic low:

SPY average trade size 2015-08-25

Are small investors throwing in the towel (200 shares of SPY equal less than $40,000)? No, it’s again the machines, shredding large orders into thousands of small pieces to avoid detection by other machines. How do we know?

Odd lots less than USD 250 more than 50pct - 2015-08-24

More than half of all odd-lot trades (trades with less than 100 shares) executed within the first ten seconds had a value of less than $250. If those were retail (= small investor) orders, they would get killed by trading commissions (usually $5-10 per trade even at discount brokers).

Large volume and small trades leads to a huge number of price changes. The largest ETF in the world (SPDR S&P 500 ETF, SPY) had over 500,000 price changes during regular trading on August 24 (or more than 20 per second).

But wait, there’s more.

Among 220 ETF’s crashing 10% or more, a few crashed every minute on the minute (that’s when the dots fall down like rain):

ETFs flash crashed every minute on the minute 2015-08-24b




Clearly non-human activity, and probably programmed by humans to behave exactly as shown.

If stocks and ETF’s are fair game for HFT (high-frequency traders), so are options. The three-day period from August 24th set new records for option volume: over 50 billion quotes:

50bn option quotes over 3 days 2015-08-26

A new record of 9 million option quotes in a single second has been reached. Why the insanity, what is to be gained?

The aim is to overwhelm trading systems run by competitors or end-investors. Of all order in large ETF’s, 43% are cancelled within 100 milliseconds:

43 pct of orders in ETF are cancelled within 100ms - Nanex 2015-06018


Same applies to stocks. Given the speed of light, almost one third of all orders have already expired before they reach a computer screen on the West Coast or in Europe:

30pct of stock quotes expired once reach Europe


And we haven’t even touched the issue of “direct access” for HFT’s (while everybody else sees data slowed-down by the “Securities Information Processor”, or SIP).

Conclusions of Part 1

  • Speculative positions in volatility-related products might have aggravated, but not triggered, the Flash Crash
  • The structure of the largest equity market in the world is highly unstable
  • Stock exchanges, enjoying immunity from lawsuits, are supposed to be “self-regulating”. Which is akin to making the fox guard the hen house.
  • The SEC (Securities Exchange Commission) is either complicit or incapable of reigning into high-frequency trading
  • Phantom liquidity vanishes the moment you need it
  • Flash crashes can happen any time, in any security
  • Retail investors get creamed trying to sell or buy during a flash crash
  • Stop-loss orders turn into loss-guaranteed-orders
  • If futures are being halted and blue chip stocks crash 20-50% on no news, what will the “market” look like when actually something significant happens?
  • Do you want to trust your life savings to this casino?

A link to part 2 and 3 will be found here in the coming days.

Special thanks to Eric Hunsader of Nanex for posting many charts used in this post. He can (and should) be followed on Twitter under @nanexllc.