Schlumberger (SLB) is down 89 cents to $39.63 after crude slips $2.16 to $43.55 a barrel on bearish weekly inventory data. In the options market, SLB options are actively traded and the day’s activity includes a substantial May 45/55 call spread on the AMEX around 10:30 ET. At that time, a customer paid $1.75, 10000X. It appears to be a new position and one tied to shares at $39.25.