If you've been waiting for stocks to get cheaper, you've been waiting a long time now. But finally, the stock market looks like it's in line to deliver its first big drop of 2012, as reawakening fears about whether the Greek sovereign debt deal will go through combine with renewed potential for a global economic slowdown to deliver a crushing blow to the bull argument. Just before 2 p.m. EST, the Dow Jones Industrials (INDEX: ^DJI) were down 197 points to 12,765, while the S&P 500 (INDEX: ^GSPC) fell 21 points to 1,343. If the market stays at its current levels, it would mark the Dow's first 100-point drop all year.

As you'd expect on such a down day, there was a lot of red ink among individual stocks. The worst offenders were those that had benefited the most from the bullishness early on this year. Bank of America (NYSE: BAC), for instance, was down about 3% in early afternoon trade as investors weigh the potential fallout if something further goes wrong in Greece. News that Allen Stanford was found guilty on 13 of 14 counts in connection with his $7 billion Ponzi scheme will likely renew the distrust among ordinary Americans of big financial institutions generally.

Caterpillar (NYSE: CAT) and Alcoa (NYSE: AA) were the worst losers in the Dow, falling between 3% and 4% each. Investors in both materials- and construction-related stocks rely on a continuing global growth picture, and Caterpillar in particular has soared recently on hopes that the worst was over for a potential slowdown. Meanwhile, Alcoa continues to struggle with low aluminum prices and the longer-term threats of substitute materials possibly encroaching on its primary sources of demand.

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