Comment by carefree-bob

The French gold originally deposited by France in US reserves in the 1950s was of the exact same purity as the French gold now, what is meant by "non-standard" just means "not stored in France".

If it was a lower purity, then when they sold the 129 tons, they would not have obtained 129 tons of "higher purity" gold and still turned a profit. They would have gotten fewer tons of gold. Your logic has the wrong sign.

Also, the fact that gold prices are rising means when France sold the gold and then purchased it later, the higher price to obtain the same quantity of gold would mean they incurred a loss, not a profit. Here, too, your sign is wrong.

Finally, at current prices, 129 tons of gold is worth $19 Billion dollars in total. It seems hard to believe that short term price declines (which is what is needed to turn a profit) would be such that gold fell over 80% in value, which is what would be needed to sell 129 tons of gold, then wait a while and buy 129 tons of gold, and end up with a profit equal to over 80% of the price of gold in question.

Moreover, rising gold prices would cause the French to earn a loss, not a profit