India, Sept. 9 -- Google's parent company added more than $230 billion ( Rs.1920000 crore or 19.2 lakh crore in INR) in market value over four days after a favourable ruling in its landmark antitrust case. The surge followed U.S. District Judge Amit Mehta's decision on 2 September, which rejected the Department of Justice's demand for a forced breakup of key Google assets such as the Chrome browser and the Android operating system.

Alphabet's stock rose 8 percent in extended trading and climbed more than 10 percent for the week. The rise contributed to a collective $420 billion increase in market value across the eight U.S. tech companies with trillion-dollar valuations, pushing their combined worth to $21 trillion.

Judge Mehta had prev...