SEATTLE (ResourceInvestor.com) -- The Institute for Supply Management's non-manufacturing index came in at 52.0 in April versus 49.6 in March, indicating growth in the service sector. According to a Reuters poll, economists had expected a reading of 49.1 for April.

In corporate news, Microsoft withdrew its $47.5 billion takeover bid for Yahoo over the weekend after last-ditch talks between Yahoo and Microsoft produced little results. Yahoo shares fell 17% in early trading Monday.

In midmorning trading, the Dow Jones industrial average fell 64.97 to 12,993.23; the Standard & Poor's 500 index fell 3.73 to 1,410.17; the Nasdaq composite index fell 4.52 to 2,472.47.

The U.S. Dollar Index fell 0.2% to 73.32 Monday. The euro was last at $1.5462 from $1.5409 late Friday, while the dollar was at 105.20 yen from 105.36 yen.

June gold was last up $13.40 at $871.40 an ounce on Nymex. Light, sweet crude for June delivery rose 47 cents to $116.79 a barrel.