Stock market live updates: Dow clinches best August since 1984, tech leads, Tesla surges

This is CNBC's markets live blog that will be updated throughout the day. 

Tech stocks rose but the Dow slipped on the final day of August. Tesla and Apple both climbed amid heavy trading volume in the first session since the companies' respective stock splits. The Dow and S&P 500 both locked in their best August in more than 30 years. 

Here's what's happened.