The document analyzes monthly return statistics for the Swiss Market Index (SMI) from 1988 to 2014. It finds that overall the average yearly return was positive at 8.72%, with more good years than bad years for the index. The worst performing month was August 2008 with a return of -18.93% while the best month was May 1990 which saw a 13.97% gain. Volatility has decreased in recent years compared to the late 1980s and early 1990s.