According to some embodiments, an indication of a trade priced relative to a reference benchmark value (e.g., a trade at index close transaction) associated with an underlying index future may be received when a basis of the trade is agreed to by parties of the trade. Moreover, the indication may be received at least one day prior to a determination of a final price and quantity of the trade. The trade might create, according to some embodiments, any derivative, such as a future, an option, or a combination of put and call options. The trade may be reported and cleared, and it may then be arranged for the trade to physically settle into the underlying index future.