The Nasdaq Composite Index finished at another record high on Thursday, marking its 38th all-time closing high in 2017. That's the highest number of records in a single session for the equity gauge since 1999, according to WSJ Market Data Group.
On a year-to-date basis, the Nasdaq has registered its most all-time highs since 1986. Over the first part of that year, the index posted 48 closing records by June 8.
You might think we're on a pace to smash the all-time record of 62 record closes, set way back in 1980. But markets don't work with that much regularity. In 1986, after those 48 closing records by June 8, there were only seven more left the rest of the year..