With useful comment explaining it in simple terms:
by
Kirk57
I’ll give you an example:
In June when the stock price was $180 Fred (being a very astute Tesla fan) realized, it was fundamentally very underpriced. Rather than buying more shares, he decides to buy call options at $750 / share that expire Feb. 7th. XYZ institution makes a lot of money by capitalizing on irrational dreamers like Fred. They looked at their data and realized no large company ever has stock that goes up 4X in less than a year. So they’re willing to sell Fred 10k options at $0.15 each.
Each option gives Fred the right to buy 100 shares of Tesla from XYZ at $750 any time over the next 8 months. So:
each option costs Fred $0.15 * 100 = $15.
10k options cost Fred $150k.
They give him the right to buy 1M shares of Tesla anytime on or before Feb. 7th for $750.
Fred’s breakeven point on the stock is $750.15. He would buy the 1M shares at $700, sell them at $700.15 and get his initial $150k back.
However if Tesla is at $1500 per share Friday, Fred buys the 1M shares from XYZ for $750, resells them for $1500 and makes $750M!
XYZ institution is sitting there in June feeling very happy with the $150k they got from Fred. Easy money!
In July TSLA goes back in the $200’s but XYZ is not that nervous.
Tesla releases the surprise Q3 results and Tesla soon jumps into the $300’s .
Now XYZ is a little nervous, so they buy 50k shares of Tesla stock. That way at least as Tesla rises, they’re protected a little in their bet, because they’ll have some of those shares, plus those shares appreciate, so it would mitigate their loss to Fred.
Tesla releases q4 and the stock jumps again. Now XYZ buys 200k shares of Tesla. XYZ and other institutions are now continually buying shares to hedge their bet against people like Fred, just in case they have to give him 1M shares below market value.
Ironically this is happening to such a large extent, this hedging causes the stock price to rise again and causes XYZ to buy even more shares! They’re now caught in a positive feedback loop where this call hedging, plus shorts covering, is causing TSLA to skyrocket, gaining more and more each day.
Now it’s Wednesday and TSLA is shooting up to over a $200 gain in one day following a $100 gain the day before. Poor XYZ has only bought 300k shares, but come Friday, they’re going to have to sell Fred 1M shares. They now know they are looking at a $750M loss to Fred, but maybe even worse, if the positive feed back loop accelerates.
So they decide to illegally force Tesla down. The problem is that if they do it more than 15 minutes before close, it will trigger a rule that will prevent them from continuing the next day. So 13 minutes before close they borrow 2M shares and sell them for lower prices than they’re worth to immediately stop Tesla’s momentum and drive the price down. They know lots of nervousTesla shareholders set limits in the $900’s to lock in their gains, and so they can start a reaction where those investors will automatically sell and the price will drop under $900 / share.
Now early yesterday morning they can sell more shares in the small German index and drive the price down further very easily, and spook lots of investors and cause everyone to sell and drive the price to the $700’s. Now slowly they can buy back the 2M shares at $750 that they borrowed at $950 and make a very nice profit of $400M.
On Friday, Tesla will close at $748 and Fred will get $0.00. XYZ pockets Fred’s $150k and they win again. They know there’s no risk, because the SEC never prosecutes stuff like this.
THE END