The Dow Jones industrial average index slipped 15 points to 11,852. The Nasdaq dropped seven points to 2308.Indian ADRs ended on a mixed note. Patni Computers surged 3.5% to $19.88. Satyam and Wipro spurted over 1.5% each to $41.12 and $14.08, respectively. Dr.Reddy's advanced over 1% to $15.45. VSNL dropped 2.7% to $18.19. MTNL and Tata Motors slipped over 1.5% each to $6.84 and $19.27, respectively.