UBS’s new long-short volatility ETN, XVIX has only been trading since December 1, 2010. XVIX has climbed a grand total of $0.40 per share (+1.6%) since then. It would be an easy winner if there was a: ”Most boring volatility investment” award. VXX has decreased from 46.99 to 31.57 (-33%) in the same period.
Is XVIX doomed to mind-numbing mediocrity, or does it have some potential for investors?
The past never perfectly predicts the future, but it can provide some clues. In order to get a feel for how XVIX will perform I did a back synthesis of its price for 2010 using the daily variations of VXX and VXZ as the basis. Since XVIX is based on the same rolling mix of volatility futures (+1x medium term, -0.5x short term) as these two ETNs I think this is a good approximation for what XVIX would have done. I have ignored the 0.89% annual investment fee in my calculations. The results of my back synthesis are shown below:

Back Synthesized XVIX price vs VIX index
This simulation suggests a 50% gain for XVIX for 2010—impressive. The purple line on the right of the graph is the XVIX actuals in addition to the back synthesized price, they align nicely. What really surprised me was the calm way that XVIX would have weathered the flash crash and associated correction in May—it didn’t miss a beat.
Looking at the chart below, it is a little clearer why the XVIX formula seems to work well. In scary times the VXZ jumps enough to cancel out the big jumps in the VXX fraction. In non-fearful times the short on VXX more than offsets the general decline of volatility and the losses due to rolling the medium term volatility futures.

XVIX investment compared to VIX, VXX, VXZ
.
.
.
.
.
.
.>
Capitalizing on the inherent decline in VXX due to the rolling of volatility futures contracts while mitigating the effects of the occasional spikes in volatility makes XVIX an attractive investment. I bought some today at $25.41 per share.