Butterfield Bank traded 2,200 common shares on the Bermuda Stock Exchange (BSX) last week.The bank opened and closed at $1.30. It also saw 17 preference shares change hands, but its share price held firm at $1,235.Overall the Index rose 1.43 points (0.13 percent) to 1,120.43 with 2,200 shares worth BD$2,860 and 17 shares worth US$21,103.77 transacted.The BSX Insurance Index also advanced 18 points (1.82 percent) to 1,005.