Monolithic Power Systems Inc. (MPWR) shares rose 1.62% to $1,334.21 on Thursday, marking the company's fourth consecutive day of gains. However, this performance was considered underwhelming relative to broader market trends and competitors within a generally positive trading session. The S&P 500 Index advanced 0.62% to close at 6,824.66, while the Dow Jones Industrial Average climbed 0.58% to reach 48,185.80. MarketWatch noted that while MPWR showed resilience with four days of gains in a row, its percentage increase was lower than what might be expected given the overall strength of the market. The article does not specify the exact percentage gains of the competitors for direct comparison beyond stating the relative underperformance. Data regarding the stock's movement was supported by world-class markets data from Dow Jones and FactSet, and the report utilized automation partnerships with Automated Insights to deliver content. The provided financial information includes intraday data delivered by FACTSET, which is subject to specific terms of use. Historical and current end-of-day data are also sourced from FACTSET, while all stock quotes presented were in local exchange time. Real-time last sale data for U.S. stock quotes reflects trades reported through Nasdaq only, with intraday data potentially delayed by at least 15 minutes depending on exchange requirements. The content is published under the copyright of MarketWatch, Inc., dated April 9, 2026.