The number of spammed stock tips has risen more than 300 percent between December and March, according to ClearSwift Limited.
"The spammers are looking at a new angle to cash in. And its financial services," said Alyn Hockey, director of research at the UK-based ClearSwift.
The UKs Financial Services Authority has been issuing warnings about e-mail fraudsters, a spokesman said.
Read the full story at Yahoo! News