"There is a lot to digest and investors are skittish. Not many want to be too aggressive in front of the Fed meeting given the possibility that they raise rates by 75 basis points at tomorrow's meeting."
At 12:15 p.m. ET, the Dow Jones Industrial Average was down 247.75 points, or 0.81%, at 30,268.99 and the Nasdaq Composite was down 1.53 points, or 0.01%, at 10,807.69.
The benchmark S&P 500 was down about 19 points, or 0.5%, at 3,732, after closing 20% below its all-time closing high on Jan. 3.
If session losses hold, the index is looking at a five-day streak of declines, its longest since the beginning of the year.