The nearest expiration date for Los Angeles Jet (OPIS) vs. NY Harbor ULSD Futures (Dec 2016) is Dec 30, 2016.
The best time to sell a futures contract is when you've already made money on the investment, but still have plenty of time left before the expiration date. Thus, a good option would be to sell Los Angeles Jet (OPIS) vs. NY Harbor ULSD Futures (Dec 2016) before Dec 30, 2016.