With everything that's happening in the world right now its amazing that the broader markets are doing as well as they are....and RVX is less than a blip.  

North Korean nuclear tests and US saber rattling

Hurricane after hurricane after hurrican, Harvey, Irma, Jose....

An 8.1 or 8.2 magnitude earthquake in Mexico...to contrast that with the 89 quake in San Fra, the one that hit during the world series...that one was "only" 6.9....my understanding of the Richter scale is a 8 magnitude quake is 10x stronger than one at 7. 

Add into that the political instability in the United States...that's my take at least, with everything going on perhaps its suprising RVX is holding up as well as it is as commodities like gold (flight to safety) climbs to new recent highs.