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Why do volatility stocks/ETFs (TVIX, VXX, UVXY) trend down in the long-term?
There is more than a single reason why TVIX loses value over time. Futures curve. VIX is always expected to trend up when under 20(although this could change in the future). This means 1 month away futures contracts are bought at a premium closer to 20. If the .VIX stayed flat at 15, by the end of the month, that contract is only worth about 15. meaning you lost 25%. This affects all VIX ETFs and makes inverse VIX ETFs attractive to hold(if you don't mind your account blowing up periodically). Leverage decay. if VIX goes down 25% two consecutive days, your x2 ETF(TVIX, UVXY) goes down 75%. Even if it doubled back to yesterday's value next day, you'd still be 25% down. ETF funding costs. The fund managers take some money from the pot every day.