BF&M shares fell 19 cents or 1.15 percent to close at $16.31 on the Bermuda Stock Exchange yesterday. Some 1,100 shares changed hands.Some 22,300 Butterfield shares closed unchanged at $1.37.And KeyTech shares rose 10 cents, or 1.72 percent, at $5.90 as 1,600 changed hands.Overall the BSX closed down 0.07, or 0.01 percent, at 1,140.98.