Volmageddon 2018: The Inverse-VIX Blowup

Key Takeaways

• On February 5, 2018, the VIX rose about 115%, its largest one-day move on record.
• XIV, an inverse-VIX ETN, lost roughly 96% in a day and was terminated.
• Late-day rebalancing by short-volatility products fed the very spike that destroyed them.
• A crowded trade and a daily-reset product turned a sell-off into a wipeout.

Background

By early 2018, betting against volatility had become one of the most popular trades on Wall Street. For years the VIX, the Cboe index of expected 30-day S&P 500 volatility, had drifted lower as stocks ground higher. Selling volatility, or holding products that profited when it fell, had paid off month after month.

A cluster of exchange-traded products let ordinary investors make that bet in a brokerage account. The largest was the VelocityShares Daily Inverse VIX Short-Term ETN, ticker XIV, issued by Credit Suisse. XIV delivered the inverse of a daily VIX futures index, so it rose when short-term VIX futures fell and fell when they rose. The ProShares Short VIX Short-Term Futures ETF, ticker SVXY, did much the same in fund form. According to the Bank for International Settlements, assets in leveraged and inverse volatility products had reached about $4 billion by the end of 2017.

These products were never meant to be held for long stretches. Each rebalanced once a day to restore its target inverse exposure, which meant the position reset every afternoon regardless of the path prices took. That daily reset is the detail that turned a bad day into a catastrophic one.

The market underneath them had grown too. The BIS noted that VIX futures open interest climbed from a daily average of about 180,000 contracts in 2011 to roughly 590,000 in 2017. More money was riding on volatility staying low than ever before, and much of it carried a built-in instruction to buy VIX futures whenever volatility rose.

What Happened

The acute phase ran across one afternoon and the after-hours session that followed.

• Morning, February 5, 2018: Stocks opened weak, extending a sell-off that had begun the prior Friday. Rising bond yields and inflation worries set the tone. February VIX futures, near 16 at the open, began climbing.
• Through the afternoon: As the S&P 500 fell, VIX futures pushed into the low 30s. Because inverse and leveraged volatility products must buy VIX futures when futures rise, their looming rebalance created a one-directional buyer waiting near the close.
• Around 4:00 to 4:15 p.m. ET: The rebalancing wave hit. The BIS recorded a spike of 115,862 VIX futures contracts within one minute at 16:08, roughly one quarter of the entire market. The buying pushed futures higher, which forced still more buying.
• Close, February 5: The S&P 500 ended down about 4.1%. The VIX closed at 37.32, up from 17.31 the day before, a jump of about 115% and around 20 points. The Dow Jones Industrial Average fell 1,175 points, about 4.6%, the largest point drop in its history at the time, after touching an intraday low near 1,597 points down.
• After hours, February 5: XIV's indicative value collapsed. Its closing value of $4.22 per share was a 96% plunge from $108.37 on February 2, by The Motley Fool's calculation. SVXY's net asset value fell from $103.72 to $3.96. Because XIV's intraday indicative value had dropped to 20% or less of the prior day's close, it tripped the acceleration clause written into its prospectus.
• February 6, 2018: Credit Suisse announced an event acceleration of XIV. The notes would be redeemed early, with an acceleration date set for February 21, 2018, and Nasdaq moving to suspend trading and delist the security.

In one session, a product that had quietly compounded gains for years was effectively gone.

Why It Happened

The collapse was not caused by a single piece of bad news. It was a feedback loop baked into the products themselves, amplified by how crowded the trade had become.

Start with the daily reset. An inverse-VIX product holds a short position in VIX futures and rebalances each day to keep that exposure constant. When VIX futures rise, the short position loses money, and to restore the target exposure the product must buy VIX futures. The bigger the move, the more it must buy. As Six Figure Investing lays out, a combined pool of roughly $5 billion in inverse and leveraged products meant a 10% move in the underlying VIX futures index could force around $500 million of futures buying into the close.

On February 5, the moves were far larger than 10%. With futures already rising sharply, the estimated rebalancing need ran into many hundreds of millions of dollars, and that buying landed in the last minutes of the session. The BIS one-minute spike of 115,862 contracts shows the result: a concentrated surge of forced buyers all needing the same trade at the same time. Their buying lifted VIX futures further, which increased the amount they had to buy. The hedge became the accelerant.

Then came the threshold inside XIV. The note's terms specified that if its intraday indicative value ever fell to 20% or less of the prior day's closing value, an acceleration event was triggered and Credit Suisse could redeem the notes early. The doubling of VIX futures pushed XIV's indicative value through that floor, so even holders who believed volatility would calm down were not given the chance to wait. The product's own safety clause locked in the loss.

A separate failure deepened the confusion. The S&P 500 VIX Short Term Futures Index, which several products tracked, contained an undisclosed quality-control feature. During fast-moving intervals after 4:00 p.m., the index reported stale, static values instead of live ones, which the SEC later sanctioned.

By the Numbers

• VIX move: closed at 37.32 on February 5 from 17.31 on February 2, up about 115% and around 20 points, its largest daily increase since the 1987 crash. (Six Figure Investing; BIS Quarterly Review, March 2018)
• S&P 500: fell about 4.1%, described by the BIS as a 3.8 standard deviation daily move and the largest one-day decline since 2011. (BIS Quarterly Review, March 2018; The Motley Fool)
• Dow Jones Industrial Average: down 1,175 points, about 4.6%, the largest point drop in its history at the time, with an intraday low near 1,597 points down. (contemporaneous reporting; Six Figure Investing)
• XIV loss: closing value of $4.22 per share, a 96% plunge from $108.37 on February 2. (The Motley Fool)
• SVXY loss: net asset value fell from $103.72 to $3.96 per share. (The Motley Fool)
• Leveraged and inverse volatility ETP assets: about $4 billion at the end of 2017. (BIS Quarterly Review, March 2018)
• Late-day rebalancing spike: 115,862 VIX futures contracts within one minute at 16:08, roughly one quarter of the market. (BIS Quarterly Review, March 2018)
• VIX futures open interest: rose from about 180,000 contracts daily in 2011 to roughly 590,000 in 2017. (BIS Quarterly Review, March 2018)
• XIV acceleration trigger: intraday indicative value of 20% or less of the prior day's close. (Credit Suisse Form 6-K, February 2018)
• SEC penalty: S&P Dow Jones Indices paid $9 million on May 17, 2021. (SEC Press Release 2021-84)

Aftermath

XIV did not recover. Credit Suisse delivered its acceleration notice and redeemed the notes, with the acceleration date set for February 21, 2018, and Nasdaq delisting the security. Holders received the small residual value rather than waiting for any rebound. According to etfgi reporting, the note's indicative value had fallen from about $99 to roughly $10 before the close. SVXY survived but was badly damaged; ProShares later cut the fund's target exposure to a less aggressive level to reduce the risk of a repeat.

The episode drew regulatory attention to how the underlying index behaved. On May 17, 2021, the SEC announced that S&P Dow Jones Indices had agreed to pay a $9 million penalty to settle charges tied to the S&P 500 VIX Short Term Futures Index. The SEC found that an undisclosed Auto Hold feature, triggered when an index value breached certain thresholds, caused the prior value to keep being reported. On February 5, 2018, personnel did not release the Auto Hold during certain intervals after 4:00 p.m., resulting in the publication of stale and static index values rather than values based on real-time VIX futures prices. S&P DJI settled without the matter going to trial.

Investors who had treated XIV as a steady income stream were left with near-total losses, and several filed lawsuits against Credit Suisse alleging the risks were not adequately disclosed. The broader short-volatility trade shrank sharply, and the surviving products were redesigned to be less explosive. Volmageddon became shorthand on trading desks for the danger of a crowded, mechanically rebalanced bet.

Lessons for Investors

1. Daily-reset products are not buy-and-hold instruments. XIV rebalanced every afternoon to maintain constant inverse exposure, which compounded gains in calm markets and compounded losses in a violent one. A product that resets daily can behave very differently from the index it tracks over any period longer than a day. Read how a product rebalances before you hold it through stress.

2. A crowded trade is its own risk. By the end of 2017 about $4 billion sat in inverse and leveraged volatility products, all programmed to buy VIX futures when futures rose. When everyone must do the same trade at the same moment, their orders move the price against themselves. Ask who else holds your position and what they are forced to do in a panic.

3. Embedded triggers can decide for you. XIV's prospectus let Credit Suisse accelerate the notes once the indicative value fell to 20% of the prior close. That clause removed any chance to wait for a recovery. Know the termination, acceleration, and liquidation terms of any structured product before you own it.

4. Selling volatility pays small premiums until it does not. The short-volatility trade earned modest, steady returns for years, which made the risk feel theoretical. The payoff profile was a long string of small wins and a rare, enormous loss. Returns that look smooth can hide a tail that takes everything.

5. Understand the plumbing behind the price. The collapse was amplified by forced late-day rebalancing and worsened by a stale index feed the SEC later sanctioned. The quoted value of a product depends on machinery most holders never see. When that machinery seizes, the price you can actually transact at may be nothing like the screen.

Frequently Asked Questions

What was Volmageddon in simple terms? Volmageddon was February 5, 2018, when the VIX more than doubled in one day and inverse-VIX products such as XIV lost almost all their value. It was the blowup of a popular bet that markets would stay calm.

Why did Volmageddon happen? A sharp stock sell-off pushed VIX futures up, which forced inverse and leveraged volatility products to buy VIX futures into the close to rebalance. That forced buying drove the spike higher in a feedback loop, and the move tripped XIV's early-termination clause.

How much money was lost in Volmageddon? XIV's value fell about 96% in a day, from $108.37 to $4.22 per share, and SVXY's net asset value fell from $103.72 to $3.96. Leveraged and inverse volatility products held roughly $4 billion in assets at the end of 2017, much of which was destroyed or sharply reduced.

Could Volmageddon happen again today? The riskiest products were terminated or redesigned to use gentler exposure, which lowers the odds of an identical wipeout. The deeper risk, a crowded trade in mechanically rebalanced products, still exists wherever many investors hold the same automated position.

What is the main lesson from Volmageddon? A bet that profits from calm can be destroyed by the very tools used to make it when calm ends. Crowded, daily-rebalancing products amplify the move that breaks them, so understand the mechanics before you hold one through stress.

Sources

1. Bank for International Settlements. BIS Quarterly Review, March 2018: The equity market turbulence of 5 February, the role of exchange-traded volatility products. https://www.bis.org/publ/qtrpdf/r_qt1803t.htm
2. U.S. Securities and Exchange Commission. Press Release 2021-84: SEC Charges S&P Dow Jones Indices for Failures Relating to Volatility-Related Index (May 17, 2021). https://www.newsfilecorp.com/release/84298/SEC-Charges-SP-Dow-Jones-Indices-for-Failures-Relating-to-VolatilityRelated-Index
3. Credit Suisse AG. Form 6-K: Announcement of Event Acceleration of XIV ETNs (filed via SEC EDGAR, February 2018). https://www.sec.gov/Archives/edgar/data/0001053092/000095010318001572/dp86358_ex9901.htm
4. Six Figure Investing. What Caused the Volatility Volmageddon on 5-Feb-2018? https://www.sixfigureinvesting.com/2019/02/what-caused-the-february-5th-2018-volatility-spike-xiv-termination/
5. The Motley Fool. The Simple Math Behind the Inverse Volatility ETF Collapse (February 6, 2018). https://www.fool.com/investing/2018/02/06/the-simple-math-behind-the-inverse-volatility-etf.aspx
6. etfgi. Credit Suisse to close inverse volatility ETN after price plunge (February 2018). https://etfgi.com/news/stories/2018/02/credit-suisse-close-inverse-volatility-etn-after-price-plunge
7. Cboe Global Markets. After the Volpocalypse: Market Observation (research publication). https://cdn.cboe.com/resources/education/research_publications/after-the-volpocalypse-market-observation.pdf

Disclaimer

This article is educational content only and is not financial advice. Nothing here is a recommendation to buy, sell, or hold any security. Consult a licensed advisor before making investment decisions.