The semiconductor sector is experiencing a broad rally, rebounding from the previous session's losses. The move is fueled by multiple positive catalysts, including a favorable report from SemiAnalysis on memory chip profitability which boosted stocks like SK Hynix and Micron. Additionally, Tower Semiconductor announced a $3 billion manufacturing expansion in Japan, causing its stock to surge. Market sentiment is also supported by reports of hedge funds buying chip stocks at the fastest pace in years, suggesting a belief that a recent selloff has concluded.