The following are some of the main factors expected to affect Swiss stocks on Wednesday:
A former UBS AG banker who pleaded guilty to conspiring to defraud the United States by helping wealthy Americans evade taxes was sentenced to five years of probation by a U.S. judge on Tuesday.
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* Evolva said it had started the commercial production of resveratrol through yeast fermentation. Resveratrol is a compound produced in grapes and other plants and is used in dietary supplements.
* Swiss gross domestic product for the first quarter due at 0545 GMT. Analysts in a Reuters poll expect GDP to have grown 1.9 percent year-on-year.
* UBS consumption indicator due at 0600 GMT.