Quote from Lawrence Chan:
Short.
Buy programs to push underlying prices up. And lock in at breakeven or better with futures.
And piggy back their real shorts through futures, options, etc.
The imbalance in the # of index future contracts traded vs. the underlying gave them out.
Quote from ASusilovic:
http://www.marketwatch.com/investing/fund/xlf
Tells you all you need to know...I wouldn't short this stuff today. Too much momentum...