Investors are shuddering on concerns of renewed trade tensions between the world's two biggest economies.  Stocks fell sharply on Friday, with the S&P 500 shedding 183 points, or 2.7%, to close at 6,553 in what was the index's worst day since April. The Dow Jones Industrial Average fell 879 points, or 1.8%, and the Nasdaq Composite dropped 3.6%.  The selloff affected a wide range of stocks, from Big Tech companies like Nvidia and Apple to stocks of smaller companies looking to get past