The Labor Department will likely have to delay the release of its employment data for September, scheduled for Friday, "as they have reported that they will not collect data, issue reports, or respond to public inquiries during the shutdown," Carey said.
After shrugging off the first day of the shutdown Tuesday, Wall Street made it clear on the second day that it was becoming more and more nervous that the budget fight could turn into something worse: a failure to raise the nation's borrowing limit.
The government will run out of money to pay its bills by Oct. 17. Congress must periodically raise the limit on government borrowing, but the once-routine matter has become the subject of bitter fights as Democrats and Republicans argue over how to reduce the country's swelling budget deficit.
But failure to raise the government's borrowing limit is seen by financial markets as a disastrous move that could send the U.S. into recession.
The Dow Jones industrial average fell 0.4 percent to close at 15,133.14. The Standard & Poor's 500 dropped 0.1 percent to 1,693.87. The Nasdaq composite declined 0.1 percent, to 3,815.02.
Benchmark oil for November delivery was down 41 cents to $103.69 per barrel in electronic trading on the New York Mercantile Exchange. The contract jumped $2.06, or 2 percent, to close at $104.10 a barrel on the Nymex on Wednesday.
In currencies, the euro rose to $1.3612 from $1.3583 late Wednesday. The dollar rose to 97.57 yen from 97.36 yen.
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