The US stock market declined from last week's record levels on Monday, 19 April 2021, with major averages all ended in negative territory, as investors elected to book recent profit amid cautious over the ongoing vaccine rollout in the US and uncertainty about the pace of global economic recovery amid spikes in coronavirus cases in several countries. At the close of trade, the Dow Jones Industrial Average index fell 123.04 points or 0.36% to 34,078. The S&P 500 fell 22.21 points or 0.53% to 4,163. The tech-heavy Nasdaq Composite Index dropped 137.58 points or to 0.98% 13,915. Nvidia shares sank after UK regulators said they will probe the company's proposed $40 billion takeover of British chipmaker Arm over national security concerns.