Advantages of Commodity Futures Investment

John is considering investing in commodity futures as part of his portfolio strategy. He understands that commodity futures are contracts that obligate the buyer to purchase, and the seller to sell, a specific quantity of a particular commodity at a predetermined price on a specified future date. He is particularly interested in the advantages that commodity futures may offer over direct investment in physical commodities.

In evaluating his options, John comes across the following potential benefits of investing in commodity futures. Which of the following advantages specifically pertains to trading in commodity futures as opposed to direct investment in the underlying physical commodities?