General Motors Corp. shares took the largest midday loss on the Dow Jones industrial average Friday, giving back some of their Thursday gains.
The blue chip index lost 87.85 points to 12,904.81.
GM shares rose 5.2 percent Thursday after the auto maker reached a tentative agreement with the Canadian Auto Workers union. GM shares fell 62 cents, or 2.9 percent, to $20.61 on Friday.
Credit card issuer American Express Co. reported that more customers missed payments in April, and shares slipped $1.22, or 2.5 percent, to $48.64.
Citigroup Inc. fell 57 cents, or 2.4 percent,to $23.16.
Only three of the index's 30 stocks were in positive territory at midday, with oil companies gaining ground as the price of crude moved into record territory, reaching a high of $127.82 on the New York Mercantile Exchange.
Chevron Corp. rose $1.50 to $99.99, and reached an all-time high of $100.26 in intraday trading.
Exxon Mobil Corp. added $1 to $92.30.
Consumer goods maker Procter & Gamble Co. picked up 13 cents to $66.49.