It was another negative week for the Island's stock market, as Butterfield Bank plunged 7.5 percent.

The Royal Gazette / Bermuda Stock Exchange (BSX) Index is now trading at levels not seen since December 2003. This week it tumbled 52.5 points, or 1.87 percent, to close on 2,804.63.

Butterfield Bank, the biggest domestic company listed on the Exchange, weighed down on the Index. It shed 60 cents over the five days of trading to close Friday on $7.40, as 25,699 shares changed hands.

Bermuda Aviation Services Ltd. suffered the biggest decline of the week, dipping 19.2 percent. The company fell $1.20 to $5.05 on the trading of 1,000 shares.

Communications company KeyTech Ltd. bucked the trend by soaring 30 percent to end the week on $13, as 4,500 of its shares traded.

Insurer BF&M Ltd. tumbled $1, or 5.8 percent, to $16.10. Stevedoring Services Ltd. was the only other issue to change value, falling 15 cents, or 2.1 percent, to $6.85, as 2,000 shares changed hands.

BSX volume was 47,187 shares and turnover was $417,132.