After the UK formally left the EU on 31 January 2020, an 11-month transition period started, which is due to end on 31 December 2020.
With the end of June came the passing of the deadline to extend this transition period beyond the end of 2020, meaning that without a change in the law, the transition period will end on 31 December 2020, regardless of whether a trade deal is in place between the UK and the EU.
This question asks: Will the transition period end on 31 December 2020, with no trade deal in place between the UK and the EU?
This question resolves positively if the transition period ends on schedule on 31 December, with no deal in place. It resolves negatively if any deal between the UK and the EU is reached either before or on this date that prevents this (including an agreement to extend the deadline, or to abandon Brexit entirely). Otherwise, it resolves as ambiguous.