Advanced Products and Due Diligence · ETFs

Many leveraged and inverse ETFs target a daily result. Compounding means a longer holding period can behave very differently from a simple multiple of the benchmark.

Read the objective and its measurement period

A fund targeting twice the daily return of an index aims at a specific daily relationship before stated costs. An inverse fund targets a negative relationship over its stated period. Some products use different reset arrangements, so read the actual prospectus. The multiplier is not a promise to deliver the same multiple over your personal holding period.

Calculate a two day path

An index starts at 100, rises 10% to 110 and then falls 9.0909% back to 100. An idealised twice daily product rises from 100 to 120, then loses 18.1818% and ends near 98.18. The index is approximately unchanged while the product loses about 1.82%, before costs. This is the arithmetic of compounding different daily exposures, not necessarily a tracking failure.

Do not reduce path dependence to a slogan

A sequence of persistent moves can produce a different relationship than a volatile round trip. Financing, derivative costs, rebalancing and extreme events add further effects. A fund linked to one stock also concentrates company risk. An inverse position can lose when the market rises and may not hedge a multiweek portfolio decline in the simple proportion expected.

Specify monitoring and loss limits

Before considering such a product, define the intended horizon, exact benchmark and the conditions for exiting or resizing. Model several paths, not merely one terminal price. Understand trading halts, gaps and the possibility of severe losses. These products require a different research and monitoring process from an ordinary broad market allocation and should not be treated as interchangeable substitutes.

Try it yourself

An index gains 5% on two consecutive days. What is the idealised return of a twice daily product before costs, and is it exactly twice the index's total return?

Show the worked answer

The product returns 1.10 multiplied by 1.10 minus 1, or 21%. The index returns 10.25%, twice which is 20.5%. Compounding makes the results different.

Further reading

Educational material, not a recommendation to transact. All numerical examples are hypothetical and exclude costs unless stated. Actual terms, eligibility, tax treatment and broker procedures depend on the security and jurisdiction.

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