The stock market is at a record high. And President Donald Trump can’t stop talking about it.

In a tweet on Tuesday morning, the president said, “Stock Market could hit all-time high (again) 22,000 today. Was 18,000 only 6 months ago on Election Day. Mainstream media seldom mentions!”

Stock Market could hit all-time high (again) 22,000 today. Was 18,000 only 6 months ago on Election Day. Mainstream media seldom mentions! — Donald J. Trump (@realDonaldTrump) August 1, 2017

Trump here is referring to the Dow Jones Industrial Average (^DJI), an index comprised of 30 “blue chip” stocks that are titans of American business. You know its members: Apple (AAPL), Nike (NKE), Verizon (VZ), Procter & Gamble (PG), JP Morgan (JPM), among others.

In addition to the Dow, the S&P 500 — often referred to as the benchmark U.S. stock index — and the Nasdaq, which is more weighted to tech stocks, were also trading near records on Tuesday.

Tuesday’s tweet also follows one sent by Trump on Monday morning talking up the stock market, as well as a Saturday afternoon post, in addition to three tweets sent July 15, including one noting that many attendees at the U.S. Women’s Open golf tournament held at Trump’s golf club in New Jersey were “really happy” with the stock market.

This is also not a new theme for Trump or other administration officials, as we noted the White House took credit for the Dow’s first pop above 20,000 back in January.

View photos Donald Trump at his golf club in Bedminster, New Jersey (AFP | SAUL LOEB) More

46% of America aren’t in the stock market

Unfortunately for many Americans, they are missing out on the benefits of higher stock prices. According to a Gallup poll from May, just 54% of Americans have money invested in stocks, either through individual ownership or as part of a retirement account.

And while this figure is up slightly from a post-financial crisis low of 52% seen in 2016, this number is well below pre-crisis levels, indicating many Americans are either still concerned about investing in the stock market or cannot afford to make this investment.

Gallup’s poll also revealed that Americans over 65 and those who make more than $100,000 per year were the only two groups polled by Gallup that increased their stock market ownership since the crisis. These groups, notably, went for Trump in the election, with Trump winning the 65+ vote by a 53%-45% margin and capturing more of the vote — though by a slim 48%-47% — among voters making between $100,000-$200,000 per year.

According to Gallup, older Americans are no less likely to invest in the stock market now than before the crisis, the percentage of 18-29 year-olds invested in the market today is down 11% from pre-crisis levels. And as we’ve noted before, getting more time in the market is the most important factor for successful retirement saving, as the benefits of compounding interest increase over time.

View photos The earlier you start saving for retirement, the more benefits you will reap. (Source: JP Morgan Asset Management) More

A recent survey from retail brokerage E-TRADE (ETFC) published this week, however, found that millennial investors are the most eager to get into the stock market, with almost one-third of those polled saying they planned to move out of cash and into the stock market. This could be a sign that younger investors are on the cusp of reversing recent trends that have run counter to what many advisors would recommend.