NEW YORK • Alphabet hit a milestone on Thursday, as a rally in the stock took it above a US$1 trillion (S$1.3 trillion) valuation for the first time, solidifying the dominance of technology and Internet stocks as the biggest titans of Wall Street.

Shares rallied in the last half hour of trading to close at US$1,450.16, up 0.8 per cent on the day.

With the gain, Alphabet became the newest member of an elite club to trade with the historic 13-digit market capitalisation.