Bank Ratings Explained: What A Through F Really Means

How the Bank Health Score Works

The Bank Health Score is a composite rating from 0 to 100 calculated from four financial metrics that bank examiners and regulators consider most important for evaluating bank safety. Each metric is normalized to a 0-100 scale and weighted based on its predictive importance for bank stability:

1. Tier 1 Capital Ratio — 35% weight. The bank's core equity capital divided by risk-weighted assets. This is the single most important predictor of whether a bank can absorb losses. Regulators require at least 8% to be "well-capitalized," but the healthiest banks maintain 14% or higher.
2. Nonperforming Loan Ratio — 30% weight (inverted). The percentage of loans where borrowers have stopped paying. Lower is better. This metric captures credit risk — the quality of the bank's lending decisions.
3. Liquidity Ratio — 25% weight. Cash and liquid securities as a share of total assets. This determines whether the bank can meet unexpected withdrawal demands — the exact weakness that caused Silicon Valley Bank's 2023 collapse.
4. Return on Assets — 10% weight. Net income divided by average assets. This measures whether the bank is profitable enough to sustain its operations and build capital through retained earnings.

What Each Grade Means

The composite score translates to a letter grade that provides an at-a-glance assessment. As of the latest FDIC data, BankHealthData tracks 3,960 banks. Here is what each grade means and how many banks fall into each category:

Grade A: Excellent (80-100) — 1,419 Banks

A-rated banks demonstrate strength across all four dimensions. They hold capital well above regulatory minimums, maintain clean loan portfolios with minimal delinquencies, keep ample liquid reserves, and generate consistent profits. These are the banks least likely to experience financial distress. For depositors, an A rating means your bank has substantial buffers to weather economic downturns, rising interest rates, or sector-specific shocks.

Among the top-rated banks, First Security Bank West holds a score of 100/100 with a Tier 1 ratio of 28.66% and a nonperforming loan ratio of 0.03%.

Grade B: Good (65-79) — 901 Banks

B-rated banks are financially sound with minor areas that could be stronger. They meet all regulatory requirements comfortably and show no immediate red flags. Most healthy community banks and well-run regional banks fall into this category. A B grade should not cause concern — it indicates solid financial management with perhaps one metric slightly below the A threshold.

Grade C: Average (50-64) — 1,082 Banks

C-rated banks show average financial health. One or two metrics may be below ideal levels — perhaps moderate nonperforming loans or below-average profitability. A C grade is not alarming, but it warrants quarterly monitoring to see whether the bank's health is improving or deteriorating. Your FDIC-insured deposits remain fully protected.

Grade D: Below Average (35-49) — 452 Banks

D-rated banks show notable financial weakness in one or more areas. These banks may have thin capital cushions, elevated loan problems, or declining profitability. While a D rating does not mean failure is imminent, it suggests the bank has less margin for error. Depositors should verify their balances are within FDIC insurance limits and monitor the trend closely.

Grade F: Weak (0-34) — 106 Banks

F-rated banks show significant financial weakness. Multiple metrics are well below healthy levels. Historically, banks that eventually failed showed F-grade scores for several quarters before closure. An F rating does not guarantee failure — many banks recover — but it warrants serious attention. Ensure all deposits are within FDIC limits, consider spreading funds across multiple institutions, and monitor the situation quarterly.

How the Score Compares to Official Regulatory Ratings

Federal bank examiners assign confidential CAMELS ratings during on-site examinations. The CAMELS system evaluates six components: Capital adequacy, Asset quality, Management, Earnings, Liquidity, and Sensitivity to market risk. Each component receives a 1 (best) to 5 (worst) rating, along with a composite score.

The Bank Health Score covers four of these six components using publicly available data. We cannot assess Management quality (which requires on-site examination) or Sensitivity to market risk (which depends on internal data about interest rate positions and derivative holdings). However, the four factors we do assess — capital, asset quality, earnings, and liquidity — represent the quantitative backbone of the CAMELS framework.

Why the Trend Matters More Than the Number

A single quarterly score is a snapshot. The trend over time tells the story. BankHealthData tracks 8 quarters of history for every bank, and the direction of the score is often more informative than the absolute level. A bank trending from 55 to 70 over four quarters is strengthening. A bank declining from 75 to 55 over the same period may be heading into difficulty.

Before the 2023 bank failures, the metrics that would have driven Health Score declines were visible in public data for multiple quarters. Rising unrealized losses, declining liquidity, and increasing dependence on rate-sensitive funding all preceded the failures of Silicon Valley Bank and Signature Bank. This is why BankHealthData emphasizes the trend view on every bank detail page.

Limitations of Any Rating System

No rating system — not BankHealthData, not CAMELS, not credit agency ratings — can predict every bank failure. Bank runs driven by social media panic, as seen with SVB, can overwhelm even a reasonably healthy bank. Management fraud, sudden regulatory actions, and black swan economic events can all cause outcomes that financial ratios alone cannot anticipate.

The Bank Health Score is designed to be a useful tool for everyday depositors, not a guarantee. It identifies patterns in public data that historically correlate with bank strength and weakness. For deposits within FDIC limits, the federal guarantee is your ultimate protection. The Health Score helps you make informed decisions about where to place additional funds and how to think about the stability of your banking relationship.