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Trailing Twelve Months.

A time period used in evaluating performance over time.

For example, TTM unit sales, sales revenue, profit measure or profitability ratio.

Many smaller bodies report annual figures, only once per year.

Often for larger organisations, each time relevant figures are available for investors, it will be when the firm reports - often quarterly or half-yearly.

Within an organisation, commonly monthly accounts are produced, but some matters - unit sales, injury-causing accidents, for example - will be reported on more frequently.

As well as use in performance evaluation, TTM figures can also be useful in detecting irregularities such as fraud, false accounting, etc.

TTM figures are sometimes referred to as "moving annual" or "rolling annual" figures and may, for example, be expressed as "moving annual total" (abbreviated to MAT).

Also known as Last Twelve Months (LTM).

See also