Argus Group slipped 12 cents (2.98 percent) on the Bermuda Stock Exchange yesterday, with 6,800 shares trading to close at $3.90. Butterfield Bank traded 55,046 shares to close at $1.10 and Butterfield Preferred traded 80 shares to close at $1230, both with no change in share price.Overall, the BSX closed at 1036.31 down 2.16 points (.21 percent), with 61,846 shares trading worth BD$87,242.60 and 80 US shares trading worth US$98,940.56.