Oil futures went negative on the CME’s exchange this week, and it seems that the exchange software handled it flawlessly.
Of course we expect it to, and languages handle that fine, but still I’d say it’s not certain that it would have, unless their people designed for it and tested it.
If it wouldn’t have, we’d have a huge mess on our hands. And since it did, we take it for granted.
Hats off to them.