Argus Group slipped 8 cents (1.95 percent) on the Bermuda Stock Exchange yesterday with 6,500 shares trading, to close at $4.02. Butterfield Bank traded 3,500 shares to close at $1.10 and Butterfield Preferred traded 10 shares to close at $1,230, both with no change in share price.Overall, the BSX closed at 1,038.47, down 1.44 points (.14 percent) with 10,000 shares trading worth BD$30,060 and 2,547 US shares trading, worth US$35,780.58.