First, the Federal Reserve raised interest rates.

U.S. stocks opened lower, and the Nasdaq fell more than 4%, because the Federal Reserve Powell suggested that the Federal Reserve would continue to raise interest rates in the next few points in time to continuously alleviate domestic inflation in the United States. It can be said that the US stock market reacted quickly to this news, and all stocks showed a downward trend. Investors panicked and sold stocks in succession, thus saving their bags. Therefore, the Fed's interest rate hike has seriously affected the development of the stock market. The Nasdaq index has fallen a lot this year, and many institutions and retail investors are facing huge losses. Moreover, if the Fed continues to raise interest rates, more funds will flow out of the stock market, and some retail investors will also take money out of the stock market and deposit it in banks, which will reduce the liquidity of the stock market and make it enter the stage of technical bear market. I'm afraid that most investors in the US stock market will be trapped this year and will not be able to return.

Second, the conflict between Russia and Ukraine has intensified.

The conflict between Russia and Ukraine has entered a white-hot stage, and the western countries led by the United States have begun to surround Russia and extend their tentacles to the Russian border. Therefore, Russia may have a direct military conflict with them, which is very unfavorable to the development of the world peace situation and risks triggering a large-scale armed conflict. Therefore, investors have chosen to leave their bags for safety, fearing that the financial system will fuse because of the outbreak of conflicts, resulting in their own investment losses. Therefore, the conflict between Russia and Ukraine is also one of the important reasons for the decline of US stocks.

Third, the US stock market bubble is too big.

The American stock market has gone up wildly in the past few years, and the related stocks have reached the stage of high valuation. Therefore, many companies' stocks are in a bubble, and some institutions choose to cash out at a high level, and retail investors are quilt cover. Moreover, the high correction of stocks naturally caused a lot of investment panic, which also intensified the selling frenzy in the US stock market.

To sum up: the above three points are the reasons for the panic decline of US stocks.