Shares of the top-five largest U.S. companies by market capitalization are all falling more than the broader stock market, as the stocks of Amazon.com Inc.          AMZN,         -4.95%        and Tesla Inc.          TSLA,         -4.49%        led the way lower. The combined market-cap losses of the five companies was about $259.9 billion as of Tuesday afternoon. In order of market-cap size, shares of Apple Inc.          AAPL,         -2.60%        shed 2.8% to lost $63.3 billion in market cap; Microsoft Corp.          MSFT,         -2.81%        dropped 2.9% to shave $58.1 billion off its market cap; Alphabet Inc.          GOOGL,         -2.76%         GOOG,         -2.87%        slid 2.8%, with its market cap falling by $43.4 billion; Amazon sank 5.2%, and lost $59.4 billion in market cap; and Tesla slumped 4.7% to lose $35.7 billion in market cap. Meanwhile, the benchmark large-cap tracker, the S&P 500          SPX,         -1.80%,        lost 1.9%.