Ah, ok that makes more sense, especially because this would almost certainly trigger a whole lot of people logging in on every device they have to make sure it

Ah, ok that makes more sense, especially because this would almost certainly trigger a whole lot of people logging in on every device they have to make sure it wasn't a device artifact, and maybe the APIs/systems were both affected by the same problem. My gut says an investment platform should have a more fault resistant messaging system, but I can't think of a reasonable fundamental security or stability threat they'd face without one, so maybe that money was better spent in other areas. Edit: Entirely theoretical, but I wonder if there's a bank-run sort of threat for a financial institution getting communication about a system like this wrong enough.