Where securities acquired by a person otherwise than as trading stock of a trade carried on by him are appropriated by him for the purposes of the trade as trading stock (whether on the commencement of the trade or otherwise), he shall be treated for the purposes of sections 710 to 728 as transferring them otherwise than in the course of the trade and re-acquiring them in the course of the trade on the day the appropriation is made.

Where securities forming part of the trading stock of a person’s trade are appropriated by him for any other purpose, or are retained by him on his ceasing to carry on the trade, he shall be treated for the purposes of sections 710 to 728 as transferring them in the course of the trade and re-acquiring them otherwise than in the course of the trade on the day the appropriation is made or (as the case may be) he ceases to carry on the trade.