There’s a line in the documentation in the “Source & Availability” section that addresses this. There’s a lot of info there, so it’s a bit hard to find.
"For balance sheet items, TTM is the average of the trailing four quarters. "
Marco,
Trailing Twelve Months (TTM) must be the sum of the trailing four quarters. The average of the trailing four quarters represents only one quarter and not 12 months.
If earnings is summed, but balance sheet is averaged, then when you divide earnings TTM by total assets TTM to compute ROA TTM, there is a factor of 4 missing.
Total assets is like # shares. It is what it is, at the time of reporting; down’t matter if it’s reported in a Quarterly or Annual statement. No further processing needed unless you want an average.
TTM is a made up line item that either a) sums 4 interim numbers or b) averages 4 numbers