Swiss stocks - Factors to watch on July 25

ZURICH, July 25 (Reuters) - Swiss stocks were poised to open lower on Friday, in line with markets across Europe, following stocks in the United States and Asia lower after weak U.S. housing data sparked concerns about banks' balance sheets.

The Swiss blue-chip index SMI .SSMI was indicated to open some 87 points lower at some 6,970 points, according to data provided by Bank Clariden Leu. CLPRE

The following are some of the main factors expected to affect Swiss stocks on Friday:

UBS (UBSN.VX: Quote, Profile, Research)

New York State sued UBS on Thursday, accusing the Swiss bank of committing a "multi-billion dollar fraud" by steering broker clients into auction-rate securities that became impossible to sell once the credit market tightened

For related news, click on [UBSN.VX-RTRS-LEN]

ROCHE (ROG.VX: Quote, Profile, Research)