美股跌幅显著收窄，澳元涨1%

Group 1 - The U.S. stock market exhibited a V-shaped recovery in early trading, with the S&P 500 index narrowing its decline to less than 0.2% [1] - The Nasdaq index turned positive, while the Dow Jones Industrial Average's decline was reduced to less than 200 points at one point [1] - The semiconductor index showed a gain of 0.8% [1] Group 2 - The Australian dollar against the U.S. dollar experienced an increase of 1.0%, reaching a value of 0.6496 [1]