KEY POINTS
  • The Dow, Nasdaq and S&P 500 all closed at record highs Wednesday.
  • The stock market may have risen too much on news of a phase one trade deal between the United States and China, Jack Manley of JP Morgan Asset Management said.
  • IAC, Match and Boeing were other key stories of the day.

The S&P 500 continued its strong run Thursday, topping the 3,200 level for the first time, but one major strategist said the market may be going too far.

Jack Manley, global market strategist for JP Morgan Asset Management, said in the Market Zone on CNBC's "Closing Bell" that investors may be too optimistic about recent developments in the trade negotiations between the United States and China and the elections in the United Kingdom.