When a financial bubble burst, nothing can stop it ; this is the conclusion we may draw after yesterday’s market action. The famous Wall Street’s adage : « Don’t try to catch a falling knife » is more than ever actual. Extreme readings have been recorded among our indicators and the carnage is widely spread. 1063 stocks reached new 52 weeks lows on the NYSE, 1710 on the Nasdaq as 510 stocks advanced on the NYSE compared to 3942 that settled down. Options traders are still active on protecting their positions by buying puts but extreme readings on put/call ratios have not been recorded yet. Finally, we observed selling activity as measured by our buying/selling index.