Today on the upside UVXY can barely keep pace 1 to 1 with Vix. When it falls back with violent downward thrust we'll be back to 4-8 to 1. So much for "double the Vix". This supposedly broken instrument still is a big giver to the downside. The next leg should be well into the 7's , and then of course to virtual Zero (figuring in reverse splits along the way).