Minutes from last month's US Federal Reserve meeting quashed hopes for a fresh liquidity boost from monetary policy makers, lowering the appeal of equities and bonds alike.
"A couple of members indicated that the initiation of additional stimulus could become necessary if the economy lost momentum or if inflation seemed likely to remain below its mandate consistent rate of 2 per cent over the medium run," the FOMC minutes from the March 13 meeting showed as they were released today.
That diminished investors' hopes the Fed might add more stimulus measures to their promise of keeping interest rates at current lows until late 2014.
In early afternoon trading in New York, the Dow Jones Industrial Average dropped 0.82 per cent, the Standard & Poor's 500 Index shed 0.81 per cent and the Nasdaq Composite Index fell 0.51 per cent.
"No more of that artificial sweetener that the markets have become so accustomed to getting a regular dose of," Peter Kenny, managing director of Knight Capital in Jersey City, New Jersey, told Reuters. "At this stage of the game, people realise the markets are going to have to do the work now."