Update (9:00pm): just a few minutes after the initial post, the squeeze is accelerating and SPCX hit just shy of $230, or $3 trillion in market cap, surpassing MSFT in value.

And what is even crazier, tomorrow SPCX options start trading, which means one good, solid gamma squeeze could send this stock to $400, surpassing NVDA as the world's biggest company in the process.

Earlier:

After a relatively calm first day of trading, the gamma squeeze crew has finally sniffed out that SpaceX's float makes it a perfect candidate for an OTM-call option driven meltup, and the stock soared ~20% today, adding over $400 billion in market in the regular session.

Commenting on the move, Vanda Track earlier noted that SpaceX topped the leaderboard as the most bought stock by retail investors for a second consecutive session, with net buying potentially set to clear $100mn for the second day in a row.

On a net basis, retail investors have now bought almost as much SPCX over the last two sessions as they bought across the entire US stock market last week. In fact, today's $93.8mn of net buying in SpaceX accounts for roughly 73% of all retail net buying across single stocks so far today.

The one notable development today according to Vanda, is that we're seeing some appetite return to semiconductor stocks. Names such as MRVL, MU, SNDK and AVGO have all seen some modest buying today amid the rebound. However, retail flows remain selective rather than broad-based, with leveraged bearish ETFs such as SQQQ and SOXS also among today's most bought securities by retail investors.

Vanda's conclusion is that "the broader message remains unchanged: SpaceX has not sparked a retail buying frenzy across the market. Instead, retail investors continue to direct capital into this one name, while maintaining a relatively cautious stance elsewhere."

And since momentum elsewhere is fading, retail has decided to double down on the very illiquid SPCX after hours, where its low float has made it a great squeeze candidate by the retail crew, and the stock is now exploding higher, and at last check was trading just over $210, meaning the stock has added $250 billion in market cap after the close - or a total of $650 billion today alone...

...  which translates into a market cap of $2.75 trillion or more than Apple's $2.65 trillion, and just behind MSFT's $2.97 trillion