1. Share price has nothing to do with bankruptcy. Bankruptcy happens when a company can't meet its obligations and debts. If a company is profitable, then by definition, it met its obligations and debts so it cannot go into bankruptcy. You go to bankruptcy protection to ward off creditors. If you are profitable, you paid off your creditors and made money on top of that so there is nothing to protect you from.
2. Shorting involves borrowing shares. There are a finite number of shares that you can borrow. So you could have an infinite supply of money but your broker only allows X amount of shares available to short.
Shorting doesn't cause bankruptcy. It's a method of profiting when companies veer towards bankruptcy of their own accord.
Think of it as surfing. The surfer doesn't cause the wave, he just rides the wave.
I think the recent $960MM debt payment was actually linked to not hitting specific share price hurdles.
Given the massive amount of debt they have outstanding versus capital on hand you could technically do that. However shares have to be available for shorting in order to achieve that.
Matt Levine has written a couple of excellent ruminations on the mechanics, social value or lack thereof, and ethics of this.
> In Windstream, a hedge fund (Aurelius Capital Management LP) discovered that a company (Windstream Holdings Inc.) had already violated the terms of its bonds, so it bought those bonds and sued for a declaration that they were in default. Nobody agreed on the default, or manufactured it, or cut any backroom deals. Last week Aurelius won in court, and yesterday Windstream filed for bankruptcy.
https://www.bloomberg.com/opinion/articles/2019-02-27/windst...
Is this a real barrier? Lending shares to short sellers at interest is basically free money to anyone who would be holding them regardless.
So the holder had the option of cash or shares at $359.87 each and took the cash naturally.
That only lasts as long as the lack of liquidity, which can be a little while but the events you're referring to were six years ago.