Examples:

Example 1

Mr. Wong buys 1 contract of gold on Tuesday and sells the contract to close position on Wednesday. T+2 for Tuesday would be Thursday and T+2 for Wednesday would be Friday. The actual holding period the gold contract would be Thursday to Friday. As Mr. Wong is buying gold contract, he needs to pay for 1 day interest.

Example 2

Mr. Chan sells 2 gold contracts on Wednesday and buys 2 contracts to close position on Thursday. T+2 for Wednesday would be Friday and T+2 for Thursday would be Monday (no settlement on weekends and holidays). The actual holding period of the gold contract would be Friday to Monday. As Mr. Wong is Selling gold contract, he receives 3 days interest.

Example 3

Mr. Lee buys 1 silver contract on Friday and sells 1 contract to close position on Tuesday. T+2 for Friday would be Tuesday (no settlement on weekends and holidays), T+2 for Tuesday would be Thursday. The actual holding period of the silver contract would be Tuesday to Thursday. As Mr. Lee is buying silver, he needs to pay 2 days interest.