Stocks ended Friday's session narrowly mixed as the market took in some selling after Thursday's explosive rally.
The Dow Jones industrial average fell 3.86 to 3,648.68, losing 12.79 for the week.
Advancing issues outnumbered decliners by about 11 to 8 on the New York Stock Exchange, where volume totaled 295.78 million shares, down from 378.77 million on Thursday.
Among individual stocks, IBM, which surged 6 1/8 Thursday, added 3/8 to 58 3/4 . However, another computermaker, Unisys, fell 2 1/2 to 11 1/2 . It was hit by a worldwide sales decline and said its goal for even "slight" revenue growth would depend on improved sales in Europe and Japan.
Conrail rose 1 1/2 to 56 3/8 . Brown Bros. Harriman upgraded the stock to buy.
Pacific Gas & Electric tumbled 1 3/4 to 27 , 1/2 following a downgrading by PaineWebber.
Mobil advanced 2 1/4 to 78 3/8 on unexpectedly strong earnings.
The NYSE Composite index of all listed common stocks was off 0.23 to 247.95 and finished the week up 0.29. The average share was down 3 cents.
The Standard & Poor's composite index of 500 stocks fell 1.10 to 447.63. The American Stock Exchange index rose 2.18 to 433.31.
The Nasdaq index gained 3.82 points at 722.56.
The Wilshire Associates Equity Index -- the market value of NYSE, American and Nasdaq issues -- was 4,453.775, down 0.356 or 0.01 percent.
The price of the Treasury's main 30-year bond slipped 1/8 point, or $1.25 per $1,000 in face value. Its yield, which moves in the opposite direction, rose to 7.22 percent from 7.21 percent late Thursday.