It's most likely $50 billion in cash equivalents, not cash. They probably have essentially 0 cash (some comparatively meaningless amount). They are highly liqu

It's most likely $50 billion in cash equivalents, not cash. They probably have essentially 0 cash (some comparatively meaningless amount). They are highly liquid instruments, but in a bank run, Apple likely wouldn't be any more able to convert them to actual cash than any other party.