A useful way to think about this: the roll yield in commodity futures is not a footnote; it is often the dominant return driver. Desk note: When the futures curve is in contango, rolling into the next contract costs money. In backwardation, rolling earns money. That structure can overwhelm the spot price move. Why investors care: That is why many commodity ETFs underperform the spot price headline over time without investors understanding why. Translate it into behavior: Crude oil can rise 15% on a spot basis while a rolling futures fund gains only 5% — the difference is the contango roll cost. Where people usually get tripped up: The mistake is treating a commodity ETF as a transparent bet on the spot price without examining the term structure. Keep this nearby on the next review: A useful review question is which funding, incentive or cash-flow channel is actually doing the work. That is usually where the edge is: not in the vocabulary, but in the structure underneath it.