Concept
What is a Section 1256 contract, and what is 60/40 treatment?
Direct answer Options on a broad-based index (the S&P 500 index itself, not an ETF on it), regulated futures, and a few other instruments. They are marked to market at year-end and any gain is taxed 60% long-term and 40% short-term regardless of holding period, a blended federal rate of 26.8% at the top bracket. California conforms to the timing but taxes both parts the same.
This is the “60/40” on an option-income fund’s fact sheet. It applies to the option premium leg only, and only federally. Options on a single stock or on an ETF get ordinary holding-period treatment. Read the one-year line.