Lloyds said it had increased its provisions against Argentina loans from £100 million to £150 million. The bank's shares fell 13p to 573p as the stock market stabilised after yesterday's 201-point drubbing. In the first half-hour of trading, the FTSE-100 edged up 10 points to 4054.4, seemingly shrugging off the latest development in the scandals sweeping corporate America. Scott Sullivan and David Myers, executives at the collapsed WorldCom telecoms giant, were arrested in Manhattan last night, six weeks after WorldCom admitted misleading investors and began a quick descent into bankruptcy.