On the morning of July 9, Nvidia (NVDA 0.53%) became the first company to surpass $4 trillion in market cap -- an achievement still out of reach for tech giants Microsoft and Apple.The accomplishment is even more impressive considering it has been just two years since Nvidia passed $1 trillion in market cap. Apple and Amazon reached $1 trillion in 2018 and Microsoft followed suit in 2019.Here's why Nvidia has emerged as the most valuable company in the world, why real results support the narrative, and why ...