Google's parent closed Friday with a market capitalization of $4.8 trillion. Nvidia was below that level on Tuesday, but a three-day rally into the end of the week pushed it to $5.2 trillion. The gap between the two has narrowed considerably over the past six months, as Alphabet shares have been on a tear, including a 34% gain in April, its best month since 2004. On Oct. 31, Nvidia's market capitalization was $4.9 trillion and Alphabet's was less than $3.4 trillion. Since then, Alphabet's stock price has so ...