BHP recovered from sharp early losses to finish flat, while Rio Tinto added 1.2 per cent.
Qantas rose 2.7 per cent to $5.49 and Flight Centre was up 1.5 per cent to $18.94 to continue Tuesday’s travel bubble momentum.
The Big Four banks each finished higher, while Afterpay and EML Payments drove a fourth day of tech sectors gains. Biotech CSL lost 0.2 per cent to close at $262.99.
CommSec markets analyst Steven Daghlian said the local market was clearly continuing to benefit from a cocktail of low interest rates, optimism over a strong economic rebound, and an enviable record of low coronavirus cases.
However, he said it remained to be seen whether the index would kick on after hitting its new milestone.
“The momentum has been there, but when we’ve approached these levels, we’ve bounced back,” he said.
“It happened in February. The market fell back in the early part of March and had been pretty much sideways since then.
“We’ll now just have to wait and see if it moves higher from here.”
Before Wednesday, the ASX 200 had not registered four straight sessions of gains since December.
The market is within 4 per cent of the all-time high set on February 20, 2020.
US futures improved as the session moved towards the close and were hinting at modest early gains on Wall Street.