Question: what is the best stock to invest in for 401k?
Answer: S&P 500 Index Fund. An S&P 500 Index Fund gives you exposure to 500 of the highest performing companies in the U.S. It represents many industries and ¾ of U.S. stock values. ... 
Vanguard Total Stock Market Index Fund Admiral Shares (VTSAX) ... 
Federal Advisor Technology Fund (FADTX)