ZURICH--SMI slides 0.39% to 8280.53. Nestle falls 0.15% after the world's biggest food company reported a 5.1% drop in first-quarter sales. Roche slips 0.35% after the cancer treatment giant reported first-quarter sales dipped 1% because of the strength of the Swiss franc. Fellow pharmaceutical giant Novartis slides 0.41%, while Actelion, Europe's biggest biotech, drops 0.67%. Credit Suisse, which reports earnings on Wednesday, edged 0.07% higher. Fellow banks UBS and Julius Baer fell 0.8% and 1.28% respectively.

Write to Zurich bureau at djnews.zurich@dowjones.com