Cornerstone Bank: how it compares with its peers
Against 23 IA banks with half to twice its assets, Cornerstone Bank's strongest measure in Q2 2026 is net interest margin (4.10% vs. a 3.80% peer median). Its weakest relative measure is return on assets (0.68% vs. 1.13%).
| Measure | Cornerstone Bank | Peer median | Rank |
|---|---|---|---|
| Return on assets Annualized net income over average assets. | 0.68% | 1.13% | Bottom third Ahead of 17% of peers |
| Net interest margin Annualized net interest income over earning assets. | 4.10% | 3.80% | Top third Ahead of 74% of peers |
| Efficiency ratio Noninterest expense per dollar of revenue. Lower is better. | 72.35% | 65.31% | Bottom third Ahead of 26% of peers |
| Assets per employee Total assets over full-time-equivalent staff. | $6.0M | $7.1M | Bottom third Ahead of 32% of peers |
| Loans to deposits Net loans and leases over total deposits. | 75.77% | 62.56% | Context |
What it means for lending operations
Its efficiency ratio of 72.35% is above the 65.31% peer median: it spends more to earn each dollar of revenue than most banks its size. Staff time on manual borrower verification (collecting pay stubs, bank statements, and employment letters, then re-keying them) is one of the larger controllable costs behind that number.
Banks closest in size
- Defiance State Bank Defiance, IA · $43M
- Community State Bank Paton, IA · $41M
- State Bank of Schaller Schaller, IA · $41M
- ITS Bank Johnston, IA · $45M
- Farmers State Bank Lake View, IA · $37M
- The First National Bank of Primghar Primghar, IA · $36M
Questions about Cornerstone Bank
How big is Cornerstone Bank?
Cornerstone Bank, established in 1897, is headquartered in Clarinda, IA. It reported $42M in total assets in its Q2 2026 FDIC call report and operates 1 office.
What is Cornerstone Bank's return on assets?
0.68% annualized in Q2 2026, against a 1.13% median for 23 IA banks with half to twice its assets, ahead of 17% of them.
What is Cornerstone Bank's efficiency ratio?
72.35% in Q2 2026: it spent about 72 cents in noninterest expense for each dollar of revenue. The peer median is 65.31%, and lower is better.
Is Cornerstone Bank growing its loans?
Net loans shrank 3.1% over the year to Q2 2026, while deposits shrank 14.1%.
Sources and method
Figures are from the FDIC’s public call report data for the quarter ending 06/30/2026, via FDIC BankFind. Return on assets and net interest margin are annualized year to date. Peers are IA banks with half to twice its assets in the same quarter, excluding this bank. The page refreshes daily, so new quarters appear as banks file. Compare another bank or see every Iowa bank ranked.