Interest

Interest is the cost of borrowing money, expressed as a percentage rate, and it directly affects the economics of energy trading. Because physical oil trading is capital intensive, interest costs influence profitability, storage decisions, and risk appetite.

Interest costs apply to financed cargoes, inventory held in storage, margin posted for derivatives, and infrastructure investments. Rising interest rates increase the cost of carry, making it more expensive to hold physical barrels over time.

In contango markets, traders evaluate whether the forward price spread covers storage and interest costs. If interest rises, storage arbitrage opportunities may disappear even if forward prices appear attractive.

Example: a trader financing a crude cargo for three months must earn enough through price appreciation or spreads to cover interest and storage. If rates rise sharply, inventory may be liquidated, increasing prompt supply and pressuring prices.