Major technology and other growth stocks such as Alphabet Inc GOOGL.O, Tesla Inc TSLA.O and Amazon.com Inc AMZN.O gave up early gains and fell between 0.2% and 1.3%. By Sruthi Shankar and Ankika Biswas April 12 (Reuters) - U.S. stock indexes gave up most of their gains on Wednesday as investors reassessed the outlook for U.S. monetary policy following inflation data, while focus shifted to minutes from the Federal Reserve's March meeting. Stock futures rallied close to 1% and Treasury yields slid after data showed U.S. consumer prices barely rose in March as the cost of gasoline declined.