Micron just plunged into a bear market, and one chart shows more pain ahead By: CNBC.com News September 12, 2018 at 08:14 AM EDT Micron shares are down 34 percent since its recent high in May as investors fear the impact of U.S.-China tariffs. Read More >> Related Stocks: Adv Micro Devices Micron Technology Taiwan Semiconductor ADR Vaneck Semiconductor ETF