Butterfield Bank traded 3,600 shares on The Bermuda Stock Exchange (BSX) yesterday.The bank’s share price remained unchanged at $1.38.Also in the banking sector, Bermuda Commercial Bank Ltd saw 2,900 shares change hands, but its share value held firm at $11.Other traders included KeyTech Ltd (2,100 shares), Argus Group Holdings Ltd (2,000), and Devonshire Industries Ltd (1,000), but all of their share prices were unaltered for the day.Overall the Index slipped 4.6 points (0.39 percent) to 1,187.9 with 11,600 shares traded.The BSX Insurance Index also fell 11 points (1.11 percent) to 976.