Frontier Bank, FSB, Palm Desert, California failed last night, costing the FDIC $4.7 million. It was the seventeenth bank failure this year. 6,656 institutions remain insured within the FDIC system through the first half of the year. That's down from 6,891 at the beginning of the year, or 3.4%, as mergers and acquisitions continue to reduce the overall number to a much higher degree than do bank failures. Stricter capital and regulatory rules continue to put pressure on relatively smaller banks, which find it difficult to remain profitable under them.