The US equity market's volatility index, the VIX, is trading at its lowest level for two years (see chart). As volatility tends to trade in a range, oscillating between periods of market calm (when the index is low) and moments of crisis (when it spikes), isn't now a good time to buy the VIX via an exchange-traded fund (ETF)?
Not so fast. You can't buy the VIX directly, just as you are not buying actual barrels of crude with an oil ETF. Instead, in both cases you are exposed to indices based on futures contracts. And the problem here is that when the current (or spot') price of equity market volatility, as shown by the VIX, is low (as now), those futures contracts tend to anticipate a rise in volatility.
So when tracker funds have to roll their positions from expiring futures contracts into those with longer-term expiry dates, they face a constant headwind. This contango', another term for the headwind, can wipe out any gains you might anticipate from a rise in spot VIX.
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For example, in the first three quarters of 2011, the VIX rose by 142% as Europe's sovereign-debt crisis grew. But VXX, a US-listed exchange-traded note (ETN) tracking short-term VIX futures, rose only 42% over the same time. The 100% difference in return was all due to contango. Worse, naive' volatility trackers such as this have proved a terrible long-term investment. Since its launch in 2009, VXX has lost 96% of its value. And while the current mid-teens level of the VIX index is the same as in April 2010, VXX is down 78% over the same period.
More recently, issuers have focused on launching volatility trackers that aim to offset some of the effects of contango. For example, Source's Nomura Voltage Mid-Term ETF switches between volatility futures and cash, based on an algorithm that compares the current VIX level with the previous month's average. This fund has over $500m in assets and represents a much better bet than a simple long-only volatility futures position. But it's not cheap. On top of a 0.3% annual management fee, you pay a 0.8% index fee and a 0.075% levy on any rebalancing. With the index's high internal turnover, total charges reach several per cent a year.
Given the complexity and costs involved, investors are better off giving volatility ETFs a miss and using the VIX as a simple signal to manage market exposure. Trim your shareholdings when the VIX is low, as now, and buy when it spikes again.
Paul Amery edits www.indexuniverse.eu .
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