ooo-errr! long VIX is a bit like short stock. Short VIX is more like long stock. Being a derivative there's borrowing (long VIX) and lending (short VIX) type 'cost (benefit) of carry' effects involved and short VIX has a overall positive bias whilst long VIX tends to have a decay effect.
That said long VIX is a better hedge when stocks move down quickly, whereas short VIX obviously adds to losses.
As a buy and hold, short VIX, treated as perhaps a 5x i.e. 20% XIV, 80% cash, is the better choice. http://tinyurl.com/jqhtdgr
BTW - thanks for the grub ack's. I didn't even notice it myself - just a pure by-chance grub.
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