Shares of Argus tumbled 57 cents, or 18 per cent, to $2.60 after 51,400 traded on The Royal Gazette/Bermuda Stock Exchange.Meanwhile, Butterfield Bank improved by 33 cents, or 0.9 per cent, to $36.33 after 310 shares changed hands. In New York, the bank’s shares were down 10 cents, or 0.27 per cent, at $36.35.The Royal Gazette/BSX Stock Exchange was up 3.45 points, or 0.15 per cent, at 2,368.44. The BSX Insurance Index was down 20.76 points, or 1.2 per cent at 1,714.Separately, Bermuda Aviation Services Limited, has requested and received permission from the Bermuda Stock Exchange to extend the deadline for filing its six-month interim financial report from December 31, 2019 to March 31, 2020.