Source: Investopedia — Trailing 12 Months (TTM) (Mira Norian)
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Introduction
Trailing 12 months (TTM), also called last 12 months (LTM), is a rolling measure of a company’s financial performance over the most recent 12 consecutive months. TTM figures give a more current, seasonally adjusted view than annual reports that may be months out of date. Analysts commonly use TTM for earnings, revenue, EPS, yield, and valuation ratios such as P/E.
Why TTM matters
– Captures recent performance on a rolling basis rather than depending only on fiscal-year filings.
– Useful for seasonal businesses because it uses the last four quarters.
– Commonly used to compute ratios (e.g., P/E TTM) that compare current market prices with recent actual results.
– Facilitates apples-to-apples comparisons across companies in the same industry.
Key concepts and terms
– TTM (Trailing 12 Months) = most recent 12 months of data.
– LTM (Last 12 Months) = same as TTM.
– TTM EPS = earnings per share for the last 12 months.
– TTM revenue = revenue earned over the last 12 months.
– Trailing P/E (P/E TTM) = current price ÷ TTM EPS.
– TTM yield = income paid over the last 12 months divided by current price (for stocks) or weighted average yield for a fund.
How TTM is typically calculated
There are two common approaches depending on the data available
1) Sum of the most recent four reported quarters (preferred when you have four quarters of income statement data):
TTM metric = Q1 + Q2 + Q3 + Q4 (most recent four quarters)
Example (TTM revenue):
Q1 = $29.4B
Q2 = $21.9B
Q3 = $30.0B
Q4 = $33.5B
TTM revenue = 29.4 + 21.9 + 30.0 + 33.5 = $114.8B
2) Adjusted annual + recent quarter method (used when only the last annual report and one new quarter are available):
TTM metric = Last fiscal year value + Most recent quarterly value − Same quarter value from prior fiscal year
This adjustment replaces the old quarter from the prior fiscal year with the newly reported quarter.
Example:
If FY2023 revenue = $400M, most recent quarter (Q1 2024) revenue = $110M, and Q1 2023 revenue = $90M:
TTM revenue = 400 + 110 − 90 = $420M
How to calculate TTM P/E and TTM yield
– Trailing P/E = Current stock price ÷ TTM EPS
Example: price = $50, TTM EPS = $2.00 → Trailing P/E = 50 ÷ 2 = 25
• TTM dividend yield (stock) = Sum of dividends paid over the prior 12 months ÷ current stock price
Example: quarterly dividend $0.10 over past 4 quarters on a $100 stock → TTM yield = (0.10 × 4) ÷ 100 = 0.4%
Where to find TTM measures
– Company filings: 10-Q (quarterly) and 10-K (annual) contain the underlying numbers to compute TTM.
– Financial data sites: many sites (Yahoo Finance, Google Finance, Bloomberg, Morningstar, etc.) provide TTM revenue, EPS, and ratios.
– Broker research and analyst reports also often report TTM figures.
Practical, step-by-step guide for calculating common TTM metrics
Step 1 — Gather data
– Obtain the most recent four quarterly income statements (or last annual + most recent quarter).
– For ratios that use share count (EPS), get the appropriate weighted average shares outstanding for each quarter if available.
Step 2 — Decide the calculation approach
– If you have four quarters: sum the line item across the four quarters.
– If you have year-end numbers + one quarter: use the adjustment formula described above.
Step 3 — Make metric-specific adjustments
– For EPS: compute total net income over four quarters and divide by weighted-average diluted shares outstanding over the same period.
– For balance-sheet averages (e.g., working capital): use averages (beginning and ending) as the underlying numbers are point-in-time.
– For items like depreciation that are recognized each quarter, sum the last four quarters.
Step 4 — Compute ratios
– Use TTM values as the denominator or numerator for ratios (e.g., price ÷ TTM EPS for P/E TTM).
Step 5 — Validate and document
– Note which quarters were used and whether any adjustments (acquisitions, divestitures, non-recurring items) were applied.
– Confirm consistency when comparing companies (same metrics and definitions).
Practical tips and best practices
– Compare peers: Always compare TTM metrics across companies in the same industry for meaningful context.
– Watch seasonality: TTM smooths seasonality but be mindful of cyclical businesses where one recent quarter can materially change the rolling 12 months.
– Adjust for one-time items: Exclude or annotate unusual or non-recurring items (asset sales, restructuring charges) if you want a ‘normalized’ TTM.
– EPS and share changes: When computing TTM EPS, make sure share counts reflect buybacks or issuance (use weighted average shares).
– Beware of differing methodology: Different data providers may compute TTM differently (some include pro forma or adjusted earnings).
– Currency and M&A effects: For multinational companies, currency swings and recent acquisitions/divestitures can distort comparisons—adjust or note these effects.
– Use TTM alongside forward metrics: Trailing metrics describe the past 12 months; pair them with forward estimates to form expectations about future performance.
Common pitfalls to avoid
– Blindly using headline TTM numbers without checking for one-offs or restatements.
– Comparing companies with different fiscal-year-ends without aligning the relevant quarters.
– Using TTM balance-sheet items as if they were flow measures—balance-sheet items often require averaging.
– Ignoring share-count dilution when using TTM EPS.
TTM Profit & Loss (TTM P&L)
A TTM P&L simply compiles the revenues and expenses for the last 12 months to calculate net profit or loss over that period. The practical steps mirror the revenue/EPS steps: sum the last four quarters’ results (or apply the adjusted annual + quarter formula), adjust for non-recurring items if you want normalized profitability, and divide by weighted-average shares to get TTM EPS.
Do LTM and TTM mean the same thing?
Yes. Last 12 months (LTM) and trailing 12 months (TTM) are interchangeable terms; both refer to the prior 12 months on a rolling basis.
When to use trailing vs forward measures
– Use TTM to understand recent actual historical performance.
– Use forward (projected) metrics to evaluate valuation relative to expected future performance (e.g., forward P/E).
Checklist for investors using TTM metrics
1. Source the four most recent quarters or the last annual and the most recent quarter.
2. Decide whether to use reported GAAP, adjusted, or pro forma numbers.
3. Sum or adjust appropriately to produce the TTM value.
4. Normalize for one-offs and material non-recurring items if comparing operating performance.
5. Recalculate ratios (P/E, EBITDA margin, yield) using TTM inputs.
6. Compare with industry peers and check trend (TTM vs previous TTM).
7. Document assumptions and note any data-provider methodology differences.
Bottom line
TTM is a practical, rolling measure of a company’s most recent 12 months of performance. It’s widely used to make more current and seasonally balanced comparisons across companies and to compute valuation multiples such as the trailing P/E. Use TTM carefully—understand the source data, adjust for one-offs and share-count changes, and compare like with like.
For more detail and examples, see the Investopedia overview: (Mira Norian).