How is an Annual Loss Expectancy (ALE) calculated?

Comprehensive and Detailed 250–300 Words Explanation From Exact Extract from Chief Information Security Officer (CCISO) Documents:

The EC-Council CCISO Body of Knowledge defines Annual Loss Expectancy (ALE) as a quantitative risk metric calculated by multiplying Single Loss Expectancy (SLE) by the Annual Rate of Occurrence (ARO).

SLE represents the financial impact of a single incident, while ARO represents the expected frequency of occurrence per year. ALE provides a clear estimate of expected annual financial loss, enabling cost-benefit analysis and informed risk treatment decisions.

CCISO materials emphasize ALE as a foundational quantitative risk analysis tool used to justify security investments, compare mitigation options, and communicate risk in financial terms to executives.

Other formulas listed are not recognized CCISO risk equations. Therefore, the correct calculation is SLE × ARO.