Silicon Valley mocks Trump over his tech bubble warning

By Heather Somerville SAN FRANCISCO (Reuters) - Republican presidential candidate Donald Trump on Tuesday warned that a dangerous financial bubble has formed in the technology industry - and Silicon Valley responded with a collective eye roll. In a Reuters interview, the New York billionaire said technology start-ups that had never earned a profit were able to sell shares at very high prices, likening the situation to the overheated stock market in 2007. Investors and others took to Twitter to p