On June 18, Monolithic Power Systems rose 3.21% overnight, trading at $1494.72/share, with turnover of $63,900. The stock had declined 3.22% during the regular session before rebounding alongside broader semiconductor sector strength in after-hours trading.

On the news front, the technical rebound follows a sharp two-day selloff that saw the stock drop over 12% from recent highs. The underlying catalyst remains NVIDIA's announcement of its next-generation 800V power architecture partner list, with MPS officially named as a core supplier. The AI data center power conversion chain upgrade positions the company as a direct beneficiary. Additionally, the ongoing power management IC price hike cycle continues to support sentiment, with the company planning to further expand repricing scope in July, bolstering second-half earnings improvement expectations.

Within the Semiconductors sector, Micron Technology rose 3.33%, Broadcom gained 2.47%, Marvell Technology advanced 2.87%, Advanced Micro Devices climbed 2.57%, and NVIDIA added 1.03%, reflecting broad sector recovery that supported the stock's overnight rebound.

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