NVIDIA Corp., Merck share gains contribute to Dow's nearly 300-point jump

Shares of NVIDIA Corp. and Merck are seeing strong returns Wednesday morning, propelling the Dow Jones Industrial Average into positive territory. Shares of NVIDIA Corp. and Merck have contributed to the index’s intraday rally, as the Dow is trading 294 points higher (0.6%). NVIDIA Corp.’s shares are up $4.82, or 2.8%, while those of Merck…