I remember one of the first big sell offs of the current downtrend. I was long 1000 Q's. Took me .50 to get out. $500 in "slippage". Nobody was buying. No new rules, etc. Now with the shorting rules, there will be a lack of covers to slow sell offs. With no covering, and no buying interest, I wonder just how hard it will be to get out of instruments that are far less liquid then something like the Q's. Never thought that could happen in the Q's.
New rules give me a whole new insight into the old axiom "sell into strength".