Swiss stocks - Factors to watch on May 11

ZURICH May 11 (Reuters) - Swiss stocks are seen opening slightly weaker on Monday after new warnings were added to Genentech Inc's cancer drug Tarceva, putting Roche (ROG.VX) stock under pressure.

The Swiss blue chip index SMI .SSMI was indicated to open 16 points lower at 5,375 points with Roche indicated down 0.91 percent, data provided by Clariden Leu showed. CLPRE

The following are some of the main factors expected to affect Swiss stocks on Monday.

UBS (UBSN.VX)(UBS.N)

The Swiss parliament will hold a hearing on Thursday to discuss what the government should do with the stake it took in struggling bank UBS (UBSN.VX)(UBS.N) last year, a newspaper reported on Saturday.

For related news, click on [UBSN.VX]

ROCHE (ROG.VX)

New warnings have been added to Genentech Inc and OSI Pharmaceutical Inc's OSIP.O cancer drug Tarceva about reports of skin reactions, eye problems and holes in the digestive tract, U.S. health regulators said on Friday.

For related news, click on [ROG.VX]

ECONOMY [M-CH]

COMPANY STATEMENTS [CNR-CH]

EQUITY RESEARCH [CH-RCH]

FOR COMPANIES TRADING EX-DIVIDEND, PLEASE CLICK ON:

.EX.S for all Swiss stocks

.EXSMI.S for blue chips

.EXNSMI.S for other stocks