There is no one credible estimate for global online commerce fraud, but there is information on the growing number of attacks over the Internet, most of which are trying to steal financial account information or commit fraud.
According to the Anti-Phishing Working group, the number of active scareware programs grew 585 percent in the first half of the year 2009, compared to the previous half year. The number of unique phishing Web sites detected in June 2009 rose to 49,084, the second-highest number recorded since they began reporting.
The European Union hopes to improve fraud level reporting with an initiative called PISCE, "Partnership for ICT Security Incident and Consumer Confidence Information Exchange," from European Network and Information Security Agency (ENISA). The purpose of PISCE is to create a platform for the exchange of information on IT security incidents and breaches, and consumer confidence trend data.
For more information, click on the Internet secuity tag above, and see the article on scareware.