LEARN · FUNDAMENTALS
Trailing twelve months aggregates the last four reported quarters (or equivalent periods) to approximate a year of results without waiting for the next fiscal year end.
TTM smooths single-quarter noise for ratios like P/E. It still lags live estimates and can include discontinued operations depending on tags.
Trailing EPS used in P/E is built from SEC diluted EPS points when four usable quarters exist; otherwise P/E stays —.