In normal times, cash more than cap is an invitation to be bought. Arbs might buy your stock on the rumor, knowing that the sale will NOT go off for less than cash on hand.
Now, like the joke says, if you buy a toaster, you get a free bank. Not many entities have the wherewithal to buy anything.
So, you sit on cash, while your BOD wonders why they can't steal it for themselves. So, if they're not chicken, stock buybacks appear.
Was that the question you wanted answered?
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