United Microelectronics is trading at $23.42 (7.6% up) following a strong pre-market extension. - The company announced on June 17-18 that it trimmed its stake in Novatek Microelectronics via exchangeable bond conversion, disposing of 2,896,036 Novatek shares for approximately NT$1.39 billion. - This occurred as the broader tech sector reacted to the Federal Reserve's decision on June 17 to hold interest rates steady, although the dot plot indicated a more hawkish outlook for future rate hikes. - The stock rose from its June 17 close of $21.76, tracking a risk-on sentiment across the semiconductor industry.