Morgan Stanley Smith Barney, a joint venture between Morgan Stanley and Citigroup, unveiled that the personal data of 34,000 investment clients stored on two CDs was lost in transit to a government office last month, says the Wall Street Journal report.

The Journal says that the CDs were password protected but not encrypted. They went gone after the brokerage company mailed them to the New York State Department of Taxation and Finance.

When the package sent by mail reached the department it was found intact but the discs were missing by the time it reached the recipient, the WSJ cited a spokesman as saying.

The information on the CDs included client names, addresses, account and tax identification numbers, the income earned on the investments in 2010 and some clients' Social Security numbers, the Journal reported.

The state office told the company about the missing CDs on June 8th and the company informed clients of the lost CDs in a letter mailed June 24.