According to a report on IBT , The Nasdaq OMX Group’s (NDAQ) website was penetrated by Hackers Tuesday.

According to spokesman Jow Christinat the breach did not affect any trading or commerce platforms

For a security purpose they can’t take a chance that’s why Nasdaq sent a message to their users on Tuesday that their user names, email addresses and passwords may have been compromised and you are advised to change your password and any other site where they use same password.

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“We have identified the issue and we are in the process of upgrading and restoring the community. We will notify you as soon as the community is live,” said the email, signed by Bruce Hashim, vice president of online services.

The site was down on Tuesday afternoon. “We are currently upgrading the NASDAQ.COM Community Site,” a message on the Web page read. “We apologize for the inconvenience.”

This is the second time in two years that the Nasdaq has been hacked. In 2011 the exchange discovered suspicious files on its servers and called in the FBI.