is mark to market accounting has to be FIFO?

Question

I am thinking to file for the mark to market trading account but I do not like FIFO. Is FIFO part of mark to market accounting?

Answer 1

FIFO or LIFO or by-lot has no impact or consequences if you use mark-to-market - all your investments are treated as fully “sold” as of Dec/31 for tax considerations.
It wouldn’t matter in which sequence you sell if you sell all of them.