Shares of Alphabet Inc. Cl A dropped 0.70% to $195.49 Tuesday, on what proved to be an all-around grim trading session for the stock market, with the S&P 500 Index falling 1.11% to 5,909.03 and ...

Replica of a dinosaur skeleton at the Googleplex, headquarters of Google Inc. Google is only one of ... [+] several units that make up Alphabet Inc. (Photo via Smith Collection/Gado/Getty Images).

(Bloomberg) -- Alphabet Inc. shares posted their biggest one-day gain since April as analysts applauded the Google parent’s announcement Monday of a major development in quantum computing ...