Several companies traded on the Bermuda Stock Exchange (BSX) yesterday, as it closed down 1.88, or 0.15 percent, at 1,231.75.KeyTech fell 15 cents or 2.7 percent as 106 shares traded to close at $5.45.Butterfield Bank remained unchanged at $1.50 as 171,300 more shares changed hands.Kentucky Fried Chicken Bermuda remained unchanged as well at $5 as 473 shares traded.And 1,000 shares in BF&M traded, the price remaining unchanged at $15, while 2,600 shares in Ascendant Group traded, the price also staying the same at $14.