How Does UVXY Work?

Updated: Mar 10th, 2017 | |

Exchange Trade Fund UVXY and its Exchange Traded Note cousin TVIX are 2X leveraged funds that track short-term volatility.  To have a good understanding of UVXY (full name:  Ultra VIX Short-Term Futures ETF) you need to know how it trades, how its value is established, what it tracks, and how ProShares makes money running it.

How does UVXY trade? 

  • UVXY trades like a stock. It can be bought, sold, or sold short anytime the market is open, including pre-market and after-market time periods.  With an average daily volume of 47 million shares its liquidity is excellent and bid/ask spreads are a penny.
  • It has an active set of options available, with seven weeks’ worth of Weeklys and close to the money strikes every 0.5 points.
  • Like a stock, UVXY’s shares can be split or reverse split. If fact, UVXY reverse split 5 times in its first four years of existence—which may be a record.  The last reverse split was a 5:1 and I’m predicting the next one will be a 5:1 ratio also.  See this post for more details on historical and predicted reverse stock splits.
  • UVXY can be traded in most IRAs / Roth IRAs, although your broker will likely require you to electronically sign a waiver that documents the various risks with this security. Shorting of any security is not allowed in an IRA.

How is UVXY’s value established?

  • Unlike stocks, owning UVXY does not give you a share of a corporation.  There are no sales, no quarterly reports, no profit/loss, no PE ratio, and no prospect of ever getting dividends.  Forget about doing fundamental style analysis on UVXY. While you’re at it forget about technical style analysis too, the price of UVXY is not driven by supply and demand—it’s a small tail on the medium sized VIX futures dog, which itself is dominated by SPX options (notional value > $100 billion).
  • According to its prospectus the value of UVXY is closely tied to twice the daily return of the S&P VIX Short-Term Futurestm  This index manages a hypothetical portfolio of the two nearest to expiration VIX futures contracts.  Every day the index specifies a new mix of VIX futures in that portfolio.  For more information on how the index itself works see this post or the UVXY prospectus.
  • The index is maintained by S&P Dow Jones Indices. The theoretical value of UVXY if it were perfectly tracking 2X the daily returns of the short-term index is published every 15 seconds as the “intraday indicative” (IV) value.  Yahoo Finance publishes this quote using the ^UVXY-IV ticker.
  • Wholesalers called “Authorized Participants” (APs) will at times intervene in the market if the trading value of UVXY diverges too much from the IV value.  If UVXY is trading enough below the IV value they start buying large blocks of UVXY—which tends to drive the price up, and if it’s trading above they will short UVXY.  The APs have an agreement with ProShares that allows them to do these restorative maneuvers at a profit, so they are highly motivated to keep UVXY’s tracking in good shape.

What does UVXY track?

  • Ideally, UVXY would exactly track the CBOE’s VIX® index—the market’s de facto volatility indicator.  However, since there are no investments available that directly track the VIX ProShares chose to track the next best choice: VIX futures.
  • VIX Futures are not as volatile as the VIX itself; solutions (e.g., like VXX) that hold unleveraged positions in VIX futures only move about 45% as much as the VIX. This shortfall leaves volatility junkies clamoring for more—hence the 2X leveraged UVXY and TVIX.
  • ProShares achieves the 2X daily return by taking advantage of the fact that VIX futures only require a small percentage (e.g. typically less than 25%) of their face value be deposited as margin to purchase the contract.  By doubling up the number of contracts they own they can double the returns.  To keep this leverage near a constant 2X they have to adjust the number of futures contracts held by the fund at the end of every trading day.  This adjustment is essentially a compounding process.
  • If you want to understand how 2X leveraged funds work in detail you should read this post, but most importantly you should know that the 2X leverage only applies to daily percentage returns, not longer term returns. For a leveraged fund longer term results depend on the volatility of the market and general trends.  In UVXY’s case these factors usually (but not always) conspire to dramatically drag down its price when held for more than a few days.
  • The leverage process isn’t the only drag on UVXY’s price. The VIX futures used as the underlying carry their own set of problems. The worst being horrific value decay over time.  Most days both sets of VIX futures that UVXY tracks drift lower relative to the VIX—dragging down UVXY’s underling non-leveraged index.   This drag is called roll or contango loss.
  • The combination of losses due to the 2X structure and contango losses add up to typical UVXY losses of 10% per month (70% per year). This is not a buy and hold investment.
  • On the other hand, UVXY does a good job of matching the short term percentage moves of the VIX. The chart below shows historical correlations with the linear best-fit approximation showing UVXY’s moves to be about 92% of the VIX’s.    The data from before UVXY’s inception on October 3, 2011 comes from my simulation of UVXY based on the underlying VIX futures.


  • Most people buy UVXY as a contrarian investment, expecting it to go up when the equities market goes down.  It does a respectable job of this with UVXY’s percentage moves averaging -5.96 times the S&P 500’s percentage move. However, 16% of the time UVXY has moved in the same direction as the S&P 500.  So please don’t say that UVXY is broken when it doesn’t happen to move the way you expect.
  • The distribution of UVXY % moves relative to the S&P 500 is shown below:


  • With erratic S&P 500 tracking and heavy price erosion over time, owning UVXY is usually a poor investment. Unless your timing is especially good you will lose money.

How does ProShares make money on UVXY?

  • As an Exchange Trade Fund (ETF) UVXY must explicitly hold the appropriate securities or swaps matching the index it tracks. ProShares does a very nice job of providing visibility into those positions.  The “Daily Holdings” tab of their website shows how many VIX futures contracts are being held.  Because of the 2X nature of the fund, the face value of the VIX futures contracts will be very close to twice the net “Other asset / cash” value of the fund.


  • ProShares collects a daily investor fee on UVXY’s assets—on an annualized basis it’s 0.95% per year.  With current assets of $700 million this fee generates around $6 million per year.  That should enough to cover ProShares UVXY costs and be profitable, however, I suspect the ProShares’ business model includes revenue from more than just the investor fee.
  • One clue on the ProShares’ business model might be contained in this sentence from UVXY&8217;s prospectus:
    “A portion of each VIX Fund’s assets may be held in cash and/or U.S. Treasury securities, agency securities, or other high credit quality short-term fixed-income or similar securities (such as shares of money market funds and collateralized repurchase agreements).”  Agency securities are things like Fannie Mae bonds.  The collateralized repurchase agreements category strikes me as a place where ProShares might be getting significantly better than money market rates.  With UVXY currently able to invest around $350 million this could be a significant income stream.
  • According to’s ETF Fund Flows tool, UVXY’s net inflows have been around $1.8 billion since its inception in 2011.  It’s currently worth $700 million, so ProShares has facilitated the destruction of about a billion dollars of customer’s money—so far.  I’m confident the overall destruction trend will continue.
  • UVXY has escaped the negative publicity that Barclays’ VXX and VelocityShares’ TVIX funds have generated, but as it continues to grow in size and continues to destroy shareholder value at eye-watering rates it’s probably a matter of time before UVXY starts getting vilified on its own merits or lack thereof.

UVXY is like a loaded gun, effective when used at the right time, but dangerous if you leave it lying around.

UVXY chart

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Friday, March 10th, 2017 |
  • Hi GammaDog,
    UVXY tracks a mix of VIX futures, not the VIX directly. While VIX futures eventually line up with the VIX on the day of their expiration they are free to go their own way before that&8211;and often do. For more see: /2015/03/how-does-uvxy-work/

  • GammaDog

    Thanks, Vance. I went back and reread the article with particular focus on the scatter plot that shows the correlation between ^VIX and UVXY. In my post yesterday I said that the data did not show a prior occurrence of a day like yestday where the ^VIX was up 4% and UVXY down 4%. I now realize that I had misread the scale of the chart by one order of magnitude. In fact, that divergence (^VIX up,and UVXY down on a given day) is everything in the lower right quadrant from the origin. While there have been no occurrences of a +40/-40 divergence, there clearly is a history of divergence in the low single digits on either side of the origin on any given day.

    Today is showing the same phenomenon (^VIX +2.4%, UVXY -1.5%). Fortunately, I bailed yesterday afternoon with a small loss which I&8217;ll file under &8220;investing college tuition payment&8221;. I&8217;m thinking that buying the UVXY as volatility insurance is like juggling lit Molotov cocktails&8230; you can impress your friends if it works&8230; or burn the crap out of yourself most of the time. Any investment where I get the fundamentals right and still lose money in the process seems like one to avoid for me.

  • In just the last year (after all the reverse splits) this dog has gone from over $800 to less than $20. Over the last 5 years it has gone from $1.2M to less than $20. So my question is, since it is optionable, why not just invest in puts a year or more out? Wouldn&8217;t the fact that the thing is such a consistent loser be a goldmine even after fees and decay?

  • James

    UVXW and tvix are the two best shorts ever. even when the market corrects they only go up briefly before continueing downward. only wish i had found them sooner

  • Buying puts is a reasonable strategy. You will likely make money, especially if you wait for a vol spike to initiate the position. The risks are a major correction, or a bear market. If one of those happens your options might not be long term enough for them to become profitable.

  • In the last 6 days UVXY went from $20 to 15 and change, even though the markets have had a rocky couple of weeks. Seems it would have been a fine near term naked put.

  • Joe

    Hi Vance,
    Thank you for all your insights about uvxy. There is lots of sentiment that a bear market is due added to all the uncertainties in the world affairs. So what are the chances that this fund will spike significantly in case of a 2008 crash model and who buys its shares
    at higher prices?
    Thank you

  • Hi Joe,
    One of the things that always impresses me is how hard it is to predict when major corrections and bear market will occur. Certainly, there will be a bear market eventually, but a lot ($ billions) have been lost, and will be lost trying to timing these volatility events. Chances are very good that UVXY will spike dramatically during the next market crash. The people that continue buying it during the spike are betting that the spike will continue / get worse. The rewards are large if you get it right.


  • Joe b

    Thank you. It might be worth going long with a minimum investment.
    What are good options for betting against the market other than shorting?

  • Nicolas Nadeau

    Hi Vance, first off thank you for your awesome website. I am looking to trade ETF that are holding short term futures and that are subject to important contango/backwardation. Apart from UVXY, would you have any suggestion?

    Thank you.

  • A Kumar

    UVXY at $10.40 is a very good buy with 3 month view.

  • Mary Brown

    I would argue he is incorrect on all three.

    Nice discussion here, though. Thanks.

  • concetto

    Dear Vance, I&8217;m thinking to buy just 1,000 dollar of UVXY. My question is: how much can I loose at all? 1000 dollar? right? they cannot ask me more? thanks a lot for your reply! really appreciated! Concetto

  • Hi Concetto, If you are buying your maximum loss is your initial investment, so yes $1000 is the most you can lose.

    Best Regards, Vance

  • William

    I day traded the UVXY today and gained $1888. It&8217;s very difficult to time though. I was using 2k shares max.