芯片股深夜全线大跌，发生了什么？

Group 1: Market Overview - Semiconductor stocks in the US experienced a significant sell-off, with the Philadelphia Semiconductor Index dropping over 2% and major companies like Broadcom, TSMC ADR, and Micron Technology falling more than 2% [1][2] - Other tech stocks also declined, with Oracle plunging over 6% and Tesla dropping more than 3% [2] - The overall market sentiment was negatively impacted by concerns over high valuations as highlighted by Federal Reserve Chairman Jerome Powell [1][2] Group 2: Government Shutdown Risk - The risk of a US government shutdown is increasing, with a 63% probability of a shutdown occurring by October 1, and a 76% chance of a shutdown by 2025 according to Polymarket [3] - The ongoing political standoff between Republicans and Democrats, particularly regarding temporary spending plans, is contributing to this uncertainty [3] Group 3: Economic Data Impact - Recent macroeconomic data revealed a stronger-than-expected Q2 GDP growth rate of 3.8%, surpassing the anticipated 3.3% [4][5] - The core Personal Consumption Expenditures (PCE) price index also exceeded expectations, recorded at 2.6% compared to the forecast of 2.5% [4][5] - This robust economic performance raises concerns about persistent inflation, potentially limiting the Federal Reserve's ability to lower interest rates in the near future [5] Group 4: Employment Market Insights - Initial jobless claims in the US decreased by 14,000 to 218,000, marking the lowest level since July, indicating a relatively healthy labor market [6] - Despite signs of a cooling labor market, the limited number of layoffs suggests that employment risks are not escalating significantly [6]