[] they sold their 'non-standard' (seems to be bars below the modern purity standards) US reserves, and replaced them with new reserves purchased elsewhere which are now stored in France. As the price of gold continued to rise as they did this, they ended up making a bunch of dinero while also centralizing their reserves.
A gain of $15b? That's roughly the value of 100 metric tons of gold, remarkably close to the 129 tons that the article says was moved... did they double the value of their gold?
When something is "realized" is a matter of accounting. It means to make the change, they sold the gold fo currrency, then bought it back. For many of us, realizing a gain is when taxes happen, though I'm not sure what it means for a nation state.
[] they sold their 'non-standard' (seems to be bars below the modern purity standards) US reserves, and replaced them with new reserves purchased elsewhere which are now stored in France. As the price of gold continued to rise as they did this, they ended up making a bunch of dinero while also centralizing their reserves.
sounds like a gain to me.