Operating cash flow (TTM) is the cash the business generated from its core operations over the last year. It shows how much cash the company's normal activities are bringing in.
Where it fits
Operating cash flow trailing twelve months (TTM) measures the total cash generated from core business operations over the past year, smoothing out quarterly fluctuations to show the company's sustainable cash-generating ability. Unlike quarterly snapshots that may be affected by seasonal patterns or timing differences, TTM operating cash flow provides a more reliable view of ongoing cash generation.
The TTM calculation:
Operating Cash Flow TTM = Sum of Operating Cash Flow from the last four quarters
For example, if quarterly operating cash flows were $100M, $80M, $120M, and $90M, the TTM figure is $390 million.
Why TTM operating cash flow matters:
- Seasonality smoothing: Retailers generate most cash in Q4; TTM shows the full picture
- Trend analysis: Compare TTM periods to identify improving or deteriorating cash generation
- Valuation metrics: Price-to-cash-flow ratios use TTM for consistency
- Coverage assessment: Evaluate ability to cover dividends, debt, and capital expenditures
Key comparisons to make:
- OCF vs. Net Income TTM: Cash flow should generally equal or exceed net income
- OCF vs. Dividends: Must cover dividend payments sustainably
- OCF vs. CapEx: Difference is free cash flow available for other uses
- OCF vs. Debt Service: Must cover interest and maturing principal
Quality indicators:
- Growing OCF TTM: Business generating more cash over time—positive sign
- OCF > Net Income: High-quality earnings with strong cash conversion
- Stable OCF TTM: Predictable cash generation supports dividends and planning
- Volatile OCF TTM: May indicate working capital challenges or cyclical business
Always examine the components of operating cash flow changes. Rising OCF from improved collections is positive; rising OCF from delaying payables may not be sustainable. The TTM view helps identify whether changes represent genuine trends or temporary timing effects.