What is this guy, Glenn Engel, smoking? Walter DCA NEW YORK, May 13 (Reuters) - Goldman Sachs said on Monday that it raised United Airlines parent, UAL Corp. (UAL), to "trading buy" from "market outperform" and set a 9-month price target of $20. UAL shares closed at $9.50 on May 10 and the stock has a 52-week range of $9.40 to $38.50. Analyst Glenn Engel said in a research note that the "market has punished airline stocs in an overreaction to weak April revenues. UAL shares are trading at post 9/11 lows" despite boosting liquidity, reaching a labor contract, and improving service. "UAL is beginning to recapture domestic share and also benefits from the relative outperformance of Asian routes," Engel said. "We cannot imagine an industry recovery that leaves out United, which has the industry's most attractive network." ©2002 Reuters Limited.