Flash Crash Anniversary: Will It Happen Again?

This week marks the one year anniversary of the Flash Crash.

As you likely remember, on May 6, 2010 an unprecedented drop sent the Dow Jones industrial average down some 700 points in minutes before it sharply rebounded -- a rapid breakdown that exposed deep flaws in the mostly electronic U.S. marketplace.

On year later, SEC chair Mary Schapiro says her agency has moved swiftly to implement key reforms, including circuit breakers to dampen stock market volatility; new rules for breaking clearly erroneous trades; rules banning "naked access" to the market; and a prohibition on stub quotes, or offers to buy or sell stock at prices that are not in line with the prevailing market.

Now, the SEC is preparing to seek comments on its limit up-limit down proposal, a plan seen as more sophisticated than disruptive circuit breakers because it would restrict traders to price bands without halting trading outright.

Flash Crash: One Year Later - A CNBC Special Report

"Can I guarantee we will never have another flash crash? No," Schapiro said. "But I think these are really important steps to take that I think go a really long way toward fortifying our market structure."

If you watch Fast Money regularly you know that Joe Saluzzi, co-founder of Themis trading has been vocal about the dangers of too much volatility and high frequency trading.

Despite all the measures taken by the SEC, he doesn't feel the problem is nearly solved.

Find out what he says must be done to keep markets safe. Watch the video now!

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Trader disclosure: On May 4, 2011, the following stocks and commodities mentioned or intended to be mentioned on CNBC’s "Fast Money" were owned by the "Fast Money" traders; Weiss owns (BTU); Weiss owns (DVN); Weiss owns (COP); Weiss owns (HK); Weiss owns (MSFT); Weiss owns (INTC); Weiss owns (QCOM); Weiss owns (JPM); Weiss owns (DF); Weiss is long (SLV) puts; Weiss is long (GDX) puts; Weiss owns (NAV); Weiss owns (DZZ); Weiss owns (UUP); Weiss owns (TBT); Weiss is short (FWLT); Weiss is short (X); Weiss is short (AKS) Terranova owns (XOM); Terranova owns (BAX); Terranova owns (SLV); Terranova owns (TCK); Terranova owns (APA); Terranova owns (HOC); Terranova owns (OXY); Terranova owns (UPL); Terranova owns (FCX); Terranova owns (BX); Terranova owns (V); Terranova owns (VRTS); Terranova owns (JPM); Terranova is short (NFLX); Terranova is short S&P Futures; Finerman and Finerman's firm own (AAPL); Finerman and Finerman's firm own (BP); Finerman owns (C); Finreman and Finerman's firm own (CVS); Finerman's firm owns (IBM); Finerman's firm owns (JPM) and is long (JPM) leaps; Finerman owns (JPM); Finerman and Finerman's firm own (MSFT); Finerman's firm owns (TGT); Finerman owns (UNG); Finerman owns (USO); Finerman's firm is short (IWM), (SPY), (MDY); Finerman's firm owns s&p puts; Finerman's firm owns Russel 200 puts; Adami owns (AGU); Adami owns (C); Adami owns (GS); Adami owns (INTC); Adami owns (MSFT); Adami owns (NUE); Adami owns (BTU)

Mike Khouw
Cantor Fitzgerald is a Market Maker in (M)

For Joe Terranova
Terranova is Chief Market Strategist of Virtus Investment Partners, LTD
Virtus Investment Partners Owns More Than 1% Of (ABAX)
Virtus Investment Partners Owns More Than 1% Of (AMKR)
Virtus Investment Partners Owns More Than 1% Of (CCG)
Virtus Investment Partners Owns More Than 1% Of (CASS)
Virtus Investment Partners Owns More Than 1% Of (CSVI)
Virtus Investment Partners Owns More Than 1% Of (EXR)
Virtus Investment Partners Owns More Than 1% Of (FCFS)
Virtus Investment Partners Owns More Than 1% Of (IGE)
Virtus Investment Partners Owns More Than 1% Of (KRC)
Virtus Investment Partners Owns More Than 1% Of (LDR)
Virtus Investment Partners Owns More Than 1% Of (NRCI)
Virtus Investment Partners Owns More Than 1% Of (DBV)
Virtus Investment Partners Owns More Than 1% Of (XLB)
Virtus Investment Partners Owns More Than 1% Of (XLV)
Virtus Investment Partners Owns More Than 1% Of (XLP)
Virtus Investment Partners Owns More Than 1% Of (XLY)
Virtus Investment Partners Owns More Than 1% Of (XLE)
Virtus Investment Partners Owns More Than 1% Of (XLF)
Virtus Investment Partners Owns More Than 1% Of (XLI)
Virtus Investment Partners Owns More Than 1% Of (XLK)
Virtus Investment Partners Owns More Than 1% Of (XLU)
Virtus Investment Partners Owns More Than 1% Of (SUBK)
Virtus Investment Partners Owns More Than 1% Of (WDFC)
Virtus Investment Partners Owns More Than 1% Of (YDNT)
Virtus Investment Partners Owns More Than 1% Of DOMINO'S PIZZA UK & URL PLC
Virtus Investment Partners Owns More Than 1% Of (DRYS)

For Brian Kelly
Accounts Managed by Brian Kelly Capital own (EBAY)
Accounts Managed by Brian Kelly Capital own (GLD)
Accounts Managed by Brian Kelly Capital own (SLV)
Accounts Managed by Brian Kelly Capital own (DIA)
Accounts Managed by Brian Kelly Capital are long gold, natural gas

For Joe Saluzzi
**No Disclosures

For Noel Archard
Archard's firm is a market marker in (SLV)

For Mary Ann Bartels
**No Disclosures

CNBC.com with wires.