KeyTech Ltd was the only climber among domestic board companies on the Bermuda Stock Exchange (BSX) last week.The telecommunications group and owner of the Bermuda Telephone Company gained 15 cents, or 2.75 percent, to close the week on $5, as 2,239 of its shares changed hands.Argus Group Holdings Ltd had a bad week, as its share price plunged 12.8 percent. The insurer fell 64 cents to $4.35 as 1,623 shares changed hands.Butterfield Bank also slipped by one cent, or 0.7 percent, to $1.49 as 1,146 shares changed hands.Ascendant Group Ltd was the most actively traded stock, but its shares remained unchanged on $14.25 as 5,700 shares changed hands.The Royal Gazette / BSX Index fell 2.91 points, or 0.23 percent, to close the week on 1,234.87. Volume topped 11,000 shares while turnover was more than $229,000.Useful website: www.bsx.com