The BSX had a quiet day of trading yesterday, with just three different stocks changing hands with a fairly low volume during the day. The largest amount of shares traded were LOM, which lost three cents to close at $3.70 on a volume of 30,000 shares. Bank of Butterfield and KeyTech both closed unchanged at $44.25 and $12 respectively. The index closed down 0.56 points or 0.02 percent at 3,241.4 on a volume of 32,143 shares worth $173,577.75