BF&M Ltd fell 30 cents, or 1.8 percent, to $16.75 as 800 shares changed hands during trading on the Bermuda Stock Exchange yesterday.Bank of NT Butterfield Preference Shares slipped $9.99, or 0.8 percent, to $1,190 as 20 shares changed hands.Bank of NT Butterfield was unchanged at $1.40 as 6,000 shares changed hands.Overall, the BSX Index slipped 2.06, or 0.18 percent, to 1,156.12 yesterday.