美联储主席：美国经济或面临供应冲击加剧的挑战

Group 1 - The impact of Trump's tariff policy is negatively affecting the U.S. economy, with Federal Reserve Chairman Powell indicating that the effects are greater than expected [1][3] - Powell noted that the U.S. may be entering a period of more frequent and persistent supply shocks, posing significant challenges for the economy and central banks [3] - The retail sector is being hit hard by tariffs, with Walmart's CEO stating that the company will raise prices on some goods due to the inability to absorb increased costs from tariffs [1][3] Group 2 - Consumer spending in the U.S. showed signs of weakness, with personal consumption expenditures growing only 1.8% in the first quarter, a notable decline from the previous quarter [1][3] - The stock market is experiencing volatility, with major indices showing mixed results, including the S&P 500 rising for the fourth consecutive day while the Nasdaq ended a six-day winning streak [5]