The top 20 US stock trading volume: Apple's rating has been downgraded, and its stock price has fallen for four consecutive days. Apple, ranked third, closed down 1.23%, with a transaction volume of 12.857 billion US dollars. As of Thursday's close, Apple has fallen for the fourth consecutive trading day, with a cumulative decline of 6% over the past four days. Apple's stock rating has been downgraded for the second time this week, and analysts are becoming more cautious about its outlook. The company has become the largest technology stock with the least bullish rating on Wall Street. Rising concerns about iPhone sales have put pressure on the stock.