By Vivek Kumar Moving markets today: Hong Kong, China stocks drop; China targets 5% growth, bitcoin passes $68,000; Fed’s Powell’s testimony in focus The S&P 500 closed slightly lower after a volatile day, with investors pausing ahead of key economic data and Fed Chair Jerome Powell’s congressional testimony. Chinese stocks declined, affecting Asian markets, due to disappointment with Beijing’s economic support plans announced during the National People’s Congress. Bitcoin reached a two-year peak. China aims for a 5% economic growth target, while momentum in China’s services sector softened in…