300 points crash for the US Market

On the Last day of Feb Month Us market closed down or may be say it as Crashed down more than 300 points .The Dow dropped 315 points to 12,266. The S&P 500 lost 37 points to 1,330. The Nasdaq fell 60 points to 2,271, a level associated with a bear market. Crude oil fell after hitting a $103.05 record.So this is like 4 month the market closed down .This time it was just not the economic data that moved the market down it has other factors also.
Market Mover

>Reports that hedge funds are forced to sell municipal bonds
>January personal income and spending slightly better than expected; the core
>PCE inflation reading was in line with estimates.
>Chicago PMI survey comes up short of expectations; lowest level since 2001
>AIG posts record loss due to massive write-down
>Dell gives cautious comments
>CNBC reports Ambac bailout hits a snag
>After Market news Berkshire Reported a 18 percent down in profit.