June 24 (Reuters) - The spotlight is on âchipmaker Micron Technology as âit prepares to âreport earnings, and investors are bracing for more volatility after recent market swings fueled by large flows tied to SpaceX and a two-day boom-bust in semiconductor stocks. Last June, Micron was a well-known if somewhat obscure company with a market âvalue of $136 billion and a long history, but not necessarily one whose quarterly earnings reports caught investors' fancy.