The company also made a $1 billion acquisition. Nortel Networks Corp (NYSE: NT) shed 8 15/16 to 99 15/16 after it posted fourth-quarter operating earnings Tuesday that outpaced analysts' estimates RealNetworks Inc. (Nasdaq: RNWK) rose 12 to 169 7/8 after it beat estimates and set a 2-for-1 stock split. Intel Corp. (INTC) lopped off 5 1/16 to 96 1/2 while Advanced Micro Devices Inc. (AMD) and International Business Machines Corp. (IBM) closed off 2 7/8 and 2 1/4 a share, respectively. Commerce One (Nasdaq: CMRC) dropped 14 7/8 to 185 after it missed analysts' estimates by a penny in its fourth quarter. BMC Software (Nasdaq: BMCS) also tumbled, down 4 5/16 to 39 3/8 after it missed analysts' estimates in its third quarter. EMC Corp. (NYSE: EMC) slid 8 3/4 to 111 1/4 after it said fourth quarter earnings were 34 cents a share, well ahead of First Call's prediction of 31 cents a share, on booming software sales.