c_last_twelve_months_net_income#

c_last_twelve_months_net_income(fis_net_income, f_fiscal_year, f_fiscal_period, configuration)[source]

Calculate the last twelve months net income (LTM net income).

For quarterly periods this function computes the rolling sum of net income over the last four quarters.

Parameters:

  • fis_net_income (DataColumn) – The net income for each period.

  • f_fiscal_year (DataColumn) – The fiscal year for each period.

  • f_fiscal_period (DataColumn) – The fiscal period (e.g., quarter) within each fiscal year.

  • configuration (Configuration) – Configuration object with attribute period (“quarterly” or “annual”).

Returns:

The last twelve months net income.

Return type:

DataColumn

Notes

For quarterly data, LTM net income is the rolling sum of the current and previous three quarters:

\[\mathrm{LTM\ Net\ Income}_t = \sum_{i=0}^{3} \mathrm{Net\ Income}_{t-i}\]

For annual data, return the period net income directly.