Both Citi and GE are part of the Dow Jones industrial average.
Stocks closed off their lows of the day, but still had big losses as investors close another unforgiving month for stocks.
The Standard & Poor's 500 index is at its lowest level since 1996, while the Dow industrials are showing their lowest finish since April 1997.
According to preliminary calculations, the Dow is down about 119 points at 7,063. The Standard & Poor's 500 index is down 17 at 735, while the Nasdaq composite index is down 13 at 1,377.
Two stocks fell for every one that rose on the New York Stock Exchange. Volume was a heavy 2.25 billion shares.
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