Providence Bank of Texas is advertising a 5.30% APY yield guaranteed for 90 days on its money market account. The minimum and maximum deposit are $15,000 and $750,000. The special doesn't seem to be listed at the bank's website. It was advertised in yesterday's Dallas Morning News. The ad is available online here.
The money market account requires a $10,000 minimum balance to avoid a $15/month fee. There are a few perks like free checks and bonus rates on CDs.
It's a small bank with one office located in Southlake, Texas which is about 10 miles northeast of Fort Worth. It was just established last August. The bank is FDIC insured (Certificate # 58560).