六问美国政府关门：\大财政\系列之二

Group 1: Government Shutdown Reasons and Duration - The primary reason for the government shutdown is the dispute over extending healthcare subsidies, particularly the tax credits under the Affordable Care Act, with Democrats advocating for extension and Republicans opposing it[2]. - The market predicts the shutdown could last over 15 days, with a 67% probability for this duration as of October 6[3]. - Historically, the U.S. government has experienced 11 shutdowns since 1980, averaging 8.6 days in duration, with October being a peak month for such events[5][19]. Group 2: Economic Impact - A government shutdown lasting one month is estimated to impact GDP by only 0.02%, based on past data from a 34-day shutdown in 2019, which resulted in a permanent GDP loss of approximately $30 billion[6][26]. - Employment effects are minimal, with temporary unemployment potentially rising by 0.1 percentage points during a shutdown, but typically returning to normal levels shortly after[7][31]. Group 3: Market Reactions - During past shutdowns, the S&P 500 index has shown an average increase of 2.91% with a 75% success rate of positive returns[8][34]. - U.S. Treasury yields tend to decline during shutdowns, with 10-year bonds averaging a drop of 2.25 basis points and 2-year bonds dropping by 8 basis points[8][34]. - The U.S. dollar generally weakens slightly during shutdowns, averaging a decline of 0.30%[8][34].