[See: 10 ETFs to Buy for Aggressive Growth .] UBS analyst Stephen Chin also reiterated his firm's "buy" rating and upped his price target from $30 to $32 for Micron stock. Despite the huge quarter, there are still some Micron skeptics on Wall Street. Pacific Crest analyst Weston Twigg says Micron's guidance is "extraordinarily strong," but he is concerned with the possibility of volatility in memory pricing in the second half of the year. Twigg says Micron investors may experience "a roller-coaster ride" in late 2017 or early 2018 as Samsung expands its DRAM capacity.