The Dow Jones industrial average fell 62 points, or 0.4 per cent, to 14,452 Monday. It had plunged as much as 110 points in the early going, briefly turned positive in the afternoon then fell back again in the last hour of trading.
The Standard & Poor's 500 fell eight points, or 0.6 per cent, to 1,552. The Nasdaq composite dropped 11 points, or 0.4 per cent, to 3,237.
European markets also declined.
Three stocks fell for every two that rose on the New York Stock Exchange. Volume was 3.1 billion shares, lighter than average.