Rollover
(1981)

Hubbell Smith (Kris Kristofferson) investigates the mysterious account 21214 and finds out that the Saudis are quietly investing their oil dollars in gold.

Lee Winters (Jane Fonda) also finds out about the account but doesn't get the big picture. She attempts to blackmail her Saudi lenders in order to get back her shares (that the Saudis are holding as security).

After a kidnapping attempt on her fails, the Saudis get scared and pull out all their dollars away from the US banks at once, which results in a global finance crisis.

Thanks Tilman!