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Speculation, rolling and commodity investing

7 minute read · By Krishna Avadhani, Vestora Academy · Updated 18 October 2026

Speculators provide liquidity by taking the other side of hedgers. Trend-following funds (managed futures, CTAs) trade futures across many markets and have historically done well in some prolonged crises, such as 2008 and 2022, though they lag in choppy markets.

Futures expire, so long-term exposure requires rolling: selling the expiring contract and buying a later one. In contango, rolling means selling low and buying high repeatedly, a "roll cost" that has made some commodity ETFs underperform the spot price badly over time.

When comparing commodity investments, check whether the product holds physical metal (common for gold ETFs), futures (oil, broad commodity funds) or company shares (miners).

Key takeaways

  • Rolling futures in contango creates a hidden drag.
  • Managed-futures funds trend-follow across markets.
  • Physical, futures-based and miner exposures behave differently.

Check your understanding

1. Why do some oil futures ETFs lag the oil spot price over time?

  • Management fees only
  • Roll costs in contango
  • Dividends
  • Currency hedging only
Show the answer

Roll costs in contango. Repeatedly rolling into higher-priced contracts erodes returns.

2. A CTA or managed-futures fund mainly...

  • Buys only bank shares
  • Follows trends across many futures markets
  • Sells covered calls
  • Holds cash
Show the answer

Follows trends across many futures markets. They trade trends in commodities, currencies, bonds and indices.

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General education only, not financial advice. Examples are illustrations. Rules, tax settings and products change; check official sources.