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Maximum Drawdown

Measure the largest peak-to-trough loss in a value series.

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Local calculations. Results are estimates, not professional advice.

Maximum drawdown

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Educational estimate using your entered assumptions; no live prices, tax rules or guaranteed returns.

Formula

At each time, compare portfolio value with the highest value reached so far. The drawdown is 1−Vₜ/Hₜ; maximum drawdown is the largest such fraction. Vₜ is current value and Hₜ is the running peak.

Measure the largest peak-to-trough loss in a value series.

Worked example

Positive portfolio values in time order
100, 120, 90, 110, 80, 130
Maximum drawdown
33.3333333333 %
Peak observation number
2
Trough observation number
5

Scope and limitations

Educational estimate using your entered assumptions; no live prices, tax rules or guaranteed returns.

Inputs are checked for missing values and allowed ranges. A result outside the finite numeric range is not displayed. Rounding affects display, while the calculation uses the model’s numeric precision.

Check your units and assumptions before relying on a result. Changing a label does not convert a currency or physical unit.

Formula version: 67edb18d514c · Example checked:

Methodology

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