Net Interest Margin (Bank Only) % is a measure of the difference between the interest income generated by banks or other financial institutions and the amount of interest paid out to their lenders (for example, deposits), relative to the amount of their interest-earning assets. It is usually calculated as a percentage of what the financial institution earns on loans in a time period and other assets minus the interest paid on borrowed funds divided by the average amount of the assets on which it earned income in that time period (the average earning assets).
GuruFocus calculates Net Interest Margin (Bank Only) % as Net Interest Income (for Banks) divided by its average earning assets. Ally Financial's annualizedNet Interest Income (for Banks) for the quarter that ended in Mar. 2026 was CHF5,848 Mil. Ally Financial's average earning assets for the quarter that ended in Mar. 2026 was CHF130,650 Mil. Therefore, Ally Financial's annualized Net Interest Margin (Bank Only) % for the quarter that ended in Mar. 2026 was 4.48%.
Ally Financial (XSWX:ALLY) Net Interest Margin (Bank Only) % Explanation
The negative value of Net Interest Margin (Bank Only) % mean the firm pays more interest for its debt than the interest revenue generated from its investment.
Ally Financial Net Interest Margin (Bank Only) % Related Terms
Ally Financial Net Interest Margin (Bank Only) % Historical Data
* Premium members only.
The historical data trend for Ally Financial's Net Interest Margin (Bank Only) % can be seen below:
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
Ally Financial Net Interest Margin (Bank Only) % Chart
XSWX:ALLY vs FCFS, KLAR, OMF: Net Interest Margin (Bank Only) % Comparison
For the Credit Services subindustry, Ally Financial's Net Interest Margin (Bank Only) %, along with its competitors' market caps and Net Interest Margin (Bank Only) % data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Ally Financial Net Interest Margin (Bank Only) % vs Credit Services Industry
For the Credit Services industry and Financial Services sector, Ally Financial's Net Interest Margin (Bank Only) % distribution charts can be found below:
* The bar in red indicates where Ally Financial's Net Interest Margin (Bank Only) % falls into.
Ally Financial Net Interest Margin (Bank Only) % Calculation
Net Interest Margin (Bank Only) % (NIM) is a measure of the difference between the interest income generated by banks or other financial institutions and the amount of interest paid out to their lenders (for example, deposits), relative to the amount of their interest-earning assets. It is usually calculated as a percentage of what the financial institution earns on loans in a time period and other assets minus the interest paid on borrowed funds divided by the average amount of the assets on which it earned income in that time period (the average earning assets).
Ally Financial's annualized Net Interest Margin (Bank Only) % for the fiscal year that ended in Dec. 2025 is calculated as
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
In the calculation of annual Net Interest Margin (Bank Only) %, the Net Interest Income (for Banks) of the last fiscal year and the average earning assets over the fiscal year are used. In calculating the quarterly data,
the Net Interest Income (for Banks) data used here is four times the quarterly (Mar. 2026) net interest income data.
Net Interest Margin (Bank Only) % is displayed in the 30-year financial page for Banks.
What does a Net Interest Margin (Bank Only) % of 4.48% mean?
Ally Financial (XSWX:ALLY) has a Net Interest Margin (Bank Only) % of 4.48% as of Mar. 2026. Net interest margin is the ratio of a bank's net interest income to its average two-period earning assets. View historical data on Ally Financial and its competitors.
Is Ally Financial's Net Interest Margin (Bank Only) % too high?
Ally Financial's current Net Interest Margin (Bank Only) % is 4.48%. Overall, Ally Financial has a GF Score™ of 68/100, reflecting its overall financial health beyond just this single metric.
How does Ally Financial's Net Interest Margin (Bank Only) % compare to FCFS and KLAR?
Ally Financial's Net Interest Margin (Bank Only) % of 4.48% can be compared against companies in the Credit Services industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Net Interest Margin (Bank Only) % for a Credit Services company?
A good Net Interest Margin (Bank Only) % depends on the Credit Services industry context. However, Net Interest Margin (Bank Only) % should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Net Interest Margin (Bank Only) % mean?
A high Net Interest Margin (Bank Only) % can signal that a stock is expensive relative to its fundamentals. Net interest margin is the ratio of a bank's net interest income to its average two-period earning assets. View historical data on Ally Financial and its competitors. Ally Financial's current Net Interest Margin (Bank Only) % is 4.48%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Ally Financial stock overvalued right now?
Ally Financial (XSWX:ALLY) has a current Net Interest Margin (Bank Only) % of 4.48%. The stock's GF Value™ is CHF31.58, compared to a current price of CHF37.15 — trading 17.6% above its estimated fair value. The current Net Interest Margin (Bank Only) % is 4.48%. Ally Financial's overall GF Score™ is 68/100 with 8 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Net Interest Margin (Bank Only) % calculated?
Net Interest Margin (Bank Only) % is calculated from a company's financial statements. For Ally Financial (XSWX:ALLY), the current Net Interest Margin (Bank Only) % is 4.48% as of Mar. 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Ally Financial (XSWX:ALLY) Overvalued in 2026?
Based on GuruFocus' analysis, Ally Financial stock appears to be overvalued.
The current stock price of CHF37.15 is trading 17.6% above its estimated GF Value™ of CHF31.58.
Key valuation signals for XSWX:ALLY:
Net Interest Margin (Bank Only) %: 4.48%
GF Value™: CHF31.58 vs. price of CHF37.15 (17.6% above fair value)
No single metric tells the full story. See the XSWX:ALLY stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Formerly the captive financial arm of General Motors, Ally Financial became an independent publicly traded firm in 2014 and is one of the largest consumer auto lenders in the country. While the firm has expanded its product offerings over time, it remains primarily focused on auto lending, with more than 70% of its loan book in consumer auto loans and dealer financing. Ally also offers auto insurance, commercial loans, credit cards, and holds a portfolio of mortgage debt, giving the bank a diversified business model that includes brokerage services.
68GF Score
Get the complete analysis for XSWX:ALLY
Net Interest Margin (Bank Only) % is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
XSWX:ALLY has been successfully added to your 
