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VIX futures contracts are held by ETF that are designed to track the VIX Volatility Index. Short-term futures contracts--generally the nearest two-months--are held by funds like VXX, XIV, and TVIX and tend to be more volatile. Medium term contracts--generally months 4-7--are held by funds like VXZ, ZIV, and TVIZ and are much more stable. |
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It is not a simple matter to translate the VIX index into an ETF product that investors can trade on the open market. VIX options trade as monthly contracts, meaning that every 30 days, the front-month contract will expire. A fund like the ETF VXX must therefore close out its contracts each month and roll them over into the next month's contract. Because uncertainty and fear generally increases the further out time you go, later contracts tend to be more expensive than near-term contracts. This phenomenon is known as Contango. The opposite situation, Backwardation, occurs when subsequent contracts trade at a discount to the front month contract. If the underlying option strip is trading in Contango, the fund effectively pays a premium each month to roll over its contracts. Over time, depending on the magnitude of the Contango, this eats away at the fund, regardless of the performance of the index that the ETF is designed to track. The table below uses data on ETF holdings and degree of contango/backwardation in the Futures market to calculate gains or losses due to rollover.