Shares in Internet security firm Baltimore Technologies hit a 27-month low today falling 20% to 65p sterling at one stage before closing at just over 70p in London.
The fall came after one of its US rivals, California-based Entrust Technologies issued a first quarter profits warning.
'In Baltimore's sector there are only two or three main companies that are listed, so the Entrust warning makes things a little bit difficult for Baltimore," said Marco Pabst, analyst at UBS Warburg.
Just over a week ago Baltimore shares tumbled more than 30% after it warned that it would not meet first quarter sales targets, largely due to a slowdown in the US economy.
