GM is trading down 83 cents to $37.83 in sympathy with Ford (F), which lost 5.4 percent after reporting earnings of 30 cents per share and 18 cents below Street estimates. A noteworthy spread traded in GM late yesterday ahead of the news. One strategist bought 2,500 June 37 calls and sold the June 33 – 42.5 strangle, 3,750X. They paid $1.15 for the package and opened a new bullish position, which is essentially selling June 33 puts to buy the June 37 – 42.5 (2X3) call ratio spread. Meanwhile, GM Feb 40 calls, which expire in three week and are now 5.7 percent out-of-the-money, were the most actives yesterday. 17,329 traded (61 percent ask), creating 13,926 in open interest, to 46,437 contracts and now the largest position in General Motors options.