Your guess would be wrong. If you’re trading physically settled commodity futures, and don’t close before the settlement date, you are now the owner of a large quantity of your commodity of choice.
How did she not get to buy oil while the reddit guy got it delivered?
And down in your reddit thread someone says:
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This is fake but this has happened before years(decades?) ago, hence why brokers added to t&c that they will close out unrolled contracts on your behalf so retards playing oil futes and cfds don't end up having barrels of oil shipped to their nearest port
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Trying to buy a single barrel of oil <> getting assigned on a futures contract. An assigned long isn't getting a physical barrel either, they're transferring into a pipeline/storage facility/truck.
You're right that your broker will do all they can to avoid you shooting both you and them in the foot. But your agreement with your broker does not control your relationship with the counterparty to your futures contract. If the broker doesn't (or can't) close your position in time you('re both) on the hook.
It just happened today: https://www.reddit.com/r/wallstreetbets/comments/1siq4m2/any...