Understanding Drawdowns in a Simulation

Summary

Calculate declines from a previous portfolio peak and compare hypothetical sizing and recovery assumptions.

Source-check scope

Source check: 2026-10-18. Checked arithmetic and removed unsupported physical-health and professional-behaviour claims.

What drawdown actually measures

A drawdown compares a portfolio's value with an earlier peak, using the same measurement basis. If an illustrative virtual portfolio peaks at $100,000 and later marks at $90,000, the peak-to-trough drawdown is ($100,000 - $90,000) / $100,000 = 10%. This number describes a past decline, not the probability of a future loss.

A different denominator for recovery

Moving from $90,000 back to $100,000 requires $10,000 / $90,000, or approximately 11.11% growth, not 10%. A 20% decline from $100,000 to $80,000 requires a 25% gain to return to the same previous peak. This asymmetry is simple arithmetic; it does not prescribe a trading strategy.

The effect of sizing assumptions

The same assumed asset movement can produce different portfolio-level changes depending on allocation. In a fee-free illustration, a 20% drop in an asset that is 10% of a $100,000 portfolio contributes approximately a 2% portfolio decline if everything else stays constant. Concentration, other holdings, fees and timing can change the observed result.

Sequence and measurement matter

Drawdown depends on the path of account values, not only the first and final price. Specify whether account values include fees, deposits or withdrawals, and whether valuations are current or delayed. A sequence built from generated practice candles is not an observed market drawdown.

Testing changes to a fictional rule

A learner may compare two explicitly hypothetical size schedules after a recorded decline. Define each rule before looking at its result; document any change so a revised rule is not mixed with the original sample. No fixed 10%, 20% or other threshold is universally suitable.

Scope of this lesson

A portfolio decline cannot be used to diagnose stress, sleep, hormones or mental-health conditions. This lesson teaches virtual portfolio arithmetic and uncertainty, not healthcare guidance or advice about recovering real financial losses.

(Educational only — not financial advice. TradeHQ offers $100,000 virtual cash for supported spot instruments. Options contracts, Greeks, futures margin and settlement are conceptual exercises; the simulator does not execute them.)

Key takeaways

• Drawdown is measured from a previous peak, with a clear valuation basis.
• Recovering from a decline requires calculating the gain on the reduced base.
• Allocation, costs and price sequence affect portfolio-level outcomes.
• No particular drawdown threshold or response is universally validated.

Check your understanding

• A virtual portfolio falls from $100,000 to $90,000. Its peak-to-trough drawdown is: Options: 5%; 10%; 11.11%; 90%. Correct answer: 10%. Why: $10,000 divided by the $100,000 peak is 10%.
• How much growth returns $90,000 to $100,000? Options: 10%; 1%; 20%; About 11.11%. Correct answer: About 11.11%. Why: The $10,000 recovery is divided by the lower $90,000 balance.
• What determines portfolio impact from an asset loss? Options: Allocation and the asset's movement, among other factors; Only the ticker; Only the price per unit; The lesson completion badge. Correct answer: Allocation and the asset's movement, among other factors. Why: Position weight affects the portfolio-level change.
• Can a drawdown percentage diagnose a health condition? Options: Yes; Only after 30 trades; No; Only for experienced traders. Correct answer: No. Why: A finance calculation is not a medical assessment.

Sources

• SEC Investor.gov — risk (https://www.investor.gov/introduction-investing/investing-basics/glossary/risk)
• SEC Investor.gov — past-performance limitations (https://www.investor.gov/introduction-investing/investing-basics/glossary/mutual-funds-past-performance)

Practise this lesson

Use $100,000 in virtual cash to practise supported spot instruments and general habits such as recording a trade thesis. Options contracts, Greeks, futures margin and daily settlement are conceptual exercises: calculate their examples in a worksheet, because TradeHQ does not execute derivatives contracts. Educational simulation only — not financial advice.