Rollover & basis
How do structural roll yields create long-term performance drag for retail commodity-tracking exchange-traded funds (ETFs)?
By Easy Money Scanner · Educational reference · Not investment advice
The short answer
Roll yield drag occurs when commodity futures-based funds (ETFs/ETPs) must sell expiring contracts and buy more expensive deferred contracts in a contango market, steadily eroding fund returns versus spot price performance.
How it works
Over time, this structural cost can accumulate, which is one reason long-term commodity futures ETPs can underperform the spot commodity price, particularly in persistently contangoed markets; regulators specifically warn investors not to assume these funds track spot prices.
An example
A long oil futures ETF lags spot oil returns due to roll costs during a contango period.
Risk & limitations
Fund returns can diverge significantly from spot commodity prices; the degree of drag varies with curve shape and is not constant or guaranteed.
Examples are hypothetical, not trade recommendations. US contract and regulatory references do not automatically apply in Canada. Rules, margin requirements and broker policies can change; confirm them with the relevant authority and your broker.