THREAD: The story of the week in finance is how a group of retail traders at @wallstreetbets, with assists from @ElonMusk and @Chamath, took down the establishment short sellers at GameStop.

A thread on the underlying mechanics of the $GME saga...

1/ First, for those unfamiliar with the business, GameStop is a videogame and merchandise retailer.

It has >5,000 stores, primarily in malls, across North America, Europe, and Australia.

The business has struggled to modernize, hurting its financial and stock performance.

2/ For a variety of business reasons, a bull (i.e. optimistic) case regarding its future performance has formed.

It really came to the forefront after RC Ventures, an entity managed by Chewy founder @ryancohen, disclosed a large position and assumed three board seats.

3/ @ryancohen summarized his case, stating:

"We are excited to bring our customer-obsessed mindset and technology experience to GameStop and its strategic assets...expanding the ways in which it delights customers and by becoming the ultimate destination for gamers."

4/ At the time of that statement on January 11, $GME stock was trading at about ~$20 per share.

Since then, the stock has surged to ~$200 per share and captured the public imagination.

But how did it happen?

There are two dynamics at play: a short squeeze and a gamma squeeze.