The Dow Jones industrial average crossed the 22,000 mark for the first time Wednesday, boosted by a rally in Apple’s shares.

Apple jumped more than 6 percent in early trades — reaching an all-time high of $159.28 — a day after the world’s largest publicly listed company reported strong results and iPhone sales, and signaled its upcoming 10th-anniversary phone is on schedule.

The iPhone maker’s stock is up about 30 percent this year, giving it a market cap above $800 billion.

That sent the Dow trading above its latest milestone in the minutes after the market open on Wednesday, capping a slew of strong corporate earnings reports that have fueled investor exuberance despite political turmoil in Washington and President Trump’s inability to execute his pro-growth policies.

The Dow has now crossed four successive 1,000-point milestones since Trump was elected Nov. 8, when the Dow closed at 18,332.

Most recently, the Dow crossed 21,000 four months ago on March 1 — helped by a jump in banking behemoths Goldman Sachs and JPMorgan. The brief thousand point climb from 20,000 to 21,000 is matched only by the 24-trading day climb the Dow took to reach 11,000 on May 3, 1999.

The Dow had posted a record close of 21,963.92 on Tuesday, just 36.08 points shy of 22,000.

The S&P 500 information technology index is up 22 percent year to date, leading other sectors, as investors look for growth in an otherwise low-growth environment.

The Dow has risen 11 percent in 2017, even as Wall Street is losing confidence that President Donald Trump and a Republican-controlled Congress would be able to cut taxes and increase infrastructure spending this year.

“Investors are completely immune to all the drama which is taking place in Washington because if you look at the performance of the Dow, it appears everything is hunky-dory,” said Naeem Aslam, chief market analyst at Think Markets UK.

“In earnings, it is all about Apple. The big news was about the production of iPhone 8, the flagship product for the firm will hit the market on time with no issues around production.”

Meanwhile, despite the recent chaos inside his cabinet, Trump has repeatedly sought to take credit for the rally in the Dow.

“Stock Market could hit all-time high (again) 22,000 today. Was 18,000 only 6 months [sic] ago on Election Day. Mainstream media seldom mentions!”

Two-thirds of S&P 500 companies have reported their second-quarter earnings so far and 72 percent of them have beaten Wall Street’s expectations, according to Thomson Reuters I/B/E/S. In a typical quarter, 64 percent of the companies beat expectations.

The results may reassure investors worried about high valuations. The S&P 500 is trading at about 18 times earnings estimates for the next 12 months, above its 10-year average of 14 times, according to Thomson Reuters Datastream.

Data showed U.S. private employers added 178,000 jobs in July, after adding 191,000 jobs in June. Economists polled by Reuters expected an addition of 185,000 jobs. The data comes ahead of the more comprehensive non-farm payrolls data on Friday.

-Kevin Dugan contributed reporting.

With Reuters