Opportunity Bank, N.A. of Texas (TX) is advertising a 5.00% APY money market account that’s guaranteed to remain at 5% APY through June 30, 2008. The minimum deposit is $2,500, and the maximum deposit is $250,000. A Free Checking Account is required to receive the 5% money market rate. Accounts must be opened by September 14, 2007.

This special is not listed at the bank’s website, but it has been advertised in the Dallas Morning News.

This is a pretty high money market rate, and the guarantee is pretty unusual for money market accounts, so if you live in the area and are looking for a liquid place to keep your money, be sure to check this high rate out.