Roll Yield

Why your commodity ETF can lose while oil rises

Here's a puzzle that trips up new investors: crude oil prices are flat or even up over a year, yet your crude-tracking fund is down. The culprit is usually roll yield.

Futures contracts expire. An investor who wants continuous exposure, say to crude on the MCX or via a commodity fund, must keep selling the expiring near-month contract and buying a later-dated one. That repeated swap is the "roll," and the price gap between the two contracts produces a gain or loss that has nothing to do with the spot price moving. That is roll yield.

Contango versus backwardation

The sign of your roll yield depends on the shape of the futures curve.

- Contango: later-dated contracts cost more than the near month. Each roll means selling cheap and buying dear, a built-in loss. This is the dreaded "roll drag" that quietly erodes long commodity positions, common in oil and natural gas when storage is ample. - Backwardation: later contracts are cheaper than the near month. Each roll sells high and buys low, generating a positive roll yield that adds to returns even if spot is flat.

So two investors with identical views on oil can have wildly different outcomes depending only on whether the curve was in contango or backwardation while they held.

The takeaway

If you buy any product that holds rolling futures, commodity ETFs, certain gold or oil funds, you are silently long or short roll yield. Don't assume the fund tracks spot prices one-for-one; over months, the curve shape can dominate your return.

Before committing, check whether the underlying market tends to sit in contango or backwardation. For long-term commodity exposure, persistent contango is a structural headwind you must price in, which is one reason many Indian investors prefer physical gold or sovereign-gold-style instruments over rolling futures products. Roll yield is invisible until it has quietly cost you, so look for it before you buy, not after.