The Dow Jones Industrial Average rose about 200 points in the early session, Micron increased by 50%, and Cisco fell 8% after earnings

Boosted by the economy and corporate quarterly results, U.S. stocks rose on Thursday. The Dow Jones Industrial Average opened up 48 points or 0.1%, at 50,170 points, with early gains expanding to about 200 points or 0.4%. The Nasdaq opened up 76 points or 0.3%, at 23,142 points, with the latest trading showing a tug-of-war between bulls and bears; the S&P 500 opened up 16 points or 0.2%, at 6,957 points.

Some chip stocks performed well, with NVIDIA (NVDA.US) rising 1% and Micron (MU.US) gaining 5%. Large tech stocks had mixed results, with Tesla (TSLA.US) rising less than 1%, while Apple (AAPL.US), Microsoft (MSFT.US), and Amazon (AMZN.US) fell about 1%.

In terms of earnings, McDonald's (MCD.US) reported better-than-expected quarterly results with strong same-store sales growth, but its stock price fell about 0.4% in early trading. Cisco Systems (CSCO.US) also reported better-than-expected quarterly results, but its gross margin target was disappointing, leading to a drop of over 8% in its stock price