The SEC still has to deal with all sorts of other issues, mostly to do with high frequency trading and its effects on the markets, along with all the issues it has to tackle with financial reform.

FORBES: What's This About a Hindenburg Omen?

But May 6 could happen again and the SEC needs to be prepared, according to James Angel, a Georgetown finance professor who has been warning about the possible negative effects high frequency trading since last year.

FORBES: High Frequency Traders Face SEC/CFTC Panel