I believe that there are a rotating set of indices / markets / 2x/3x ETF's that are 'played' via TA and program trading. Someday, if I ever take the opportunity, I may actually go find out how to find out. For now, I'm content with my 4 strategies, and SPX/BGU/BGZ.
BUT, we were talking about Goldman Sachs. I'd like a shot at running with the devil ...