This article is pay walled but it make the points in the headline.

    Behind Dow 30000: A Self-Perpetuating Upward Spiral

https://www.wsj.com/articles/dow-30000-covid-economy-market-buy-and-hold-11606238819

Low interest rates and a buy-the-dip mantra have put stocks in an ascending pattern, defying the pandemic and economic woes

The U.S. stock boom has its roots in tactics that fund managers, small savers and Robinhood traders alike have applied over the past decade:

Dow hits 30,000 as Biden begins transition to White House—Here’s what experts are watching

https://www.cnbc.com/2020/11/24/dow-hits-30k-in-record-rallywhat-cramer-and-others-are-watching.html

U.S. stocks rallied on Tuesday with the Dow Jones Industrial Average hitting the never-before-seen 30,000 level.

This came after the Trump administration began the transition process for President-elect Joe Biden. The move higher also comes after Biden named Cabinet picks, including a nomination for former Federal Reserve Chair Janet Yellen to be Treasury secretary.

Many investors view Yellen as a market-friendly pick, considering that she oversaw the U.S. central bank during a long economic expansion with historically low interest rates. She’s also likely to push for further fiscal stimulus.

Seven market watchers weigh in.