Whenever Elon Musk shares something on X, his 206 million followers—including influential figures like President-elect Donald Trump—pay attention. His posts can even sway the stock market.

Since buying X, previously known as Twitter, in 2022, Musk has made over 60,000 posts. Initially, he focused on memes and jokes, along with occasional mentions of his businesses. Nowadays, he tweets daily about a wide range of topics including politics, media, and corporate matters.

Given his role as the CEO of the social media platform, his immense wealth, and his connections to Trump’s administration, even Musk’s casual remarks carry weight. For example, when he jested about acquiring MSNBC, it fueled a rumor that a host from the network had cried on-air, despite the network not being up for sale.

Although composing a tweet may take Musk just moments, the repercussions of his remarks can significantly affect trends online and the valuation of assets. Here’s an overview of instances where Musk’s comments had an immediate effect:

Stocks of defense companies drop after F-35 critique

Over the past weekend, Musk criticized F-35 fighter jets on X, sharing a video of drone swarms with the caption, “Meanwhile, some people are still building manned fighter jets like the F-35.”

In response, stocks for U.S. defense companies involved in manufacturing the jets fell, with Lockheed Martin’s stock down 3.75% and Northrop Grumman’s down 2.3%, reaching four-month lows, as reported by Investor’s Business Daily.

Surge in Dogecoin value following new department’s memes

Following Trump’s announcement of Musk’s co-lead role in a new Department of Government Efficiency (DOGE), the value of Dogecoin, a cryptocurrency with a similar name, dramatically increased.

Musk promoted Dogecoin on X shortly before and after Trump’s 6 AM announcement, sharing AI-generated images and memes featuring the coin’s Shiba Inu dog mascot.

Just five hours prior to Trump’s announcement, Dogecoin’s market cap was around $53 billion. By 10 AM that same day, it had jumped to $62.8 billion, and by Wednesday afternoon, it was about $59 billion.

Tesla stock often swayed by Musk’s remarks

The Securities and Exchange Commission (SEC) is likely still monitoring Musk’s posts on X after previously warning him several years ago to exercise more caution when discussing Tesla, his electric vehicle company.

The SEC first took action against Musk in 2018 over his tweet stating he was “considering taking Tesla private at $420. Funding secured,” labeling them as “false and misleading,” which led to a $20 million settlement, his resignation as chairman, and an agreement to have a lawyer review his Tesla-related posts.

Despite this, Musk continued his Twitter activity. In 2020, he claimed that Tesla’s stock price was “too high,” resulting in a 10% drop in price the next day and further complicating his relationship with the SEC.

Etsy shares rise after a simple comment

On a January Tuesday morning in 2021, Musk shared a brief message: “I kinda love Etsy.” This simple comment garnered 280,000 likes and led to an 8% surge in the stock price for the online marketplace known for handmade and vintage items.

Cryptocurrency boost after #bitcoin in Musk’s bio

One Friday morning in 2021, Musk added #bitcoin to his Twitter bio and remarked, “In retrospect, it was inevitable.”

Following that, Bitcoin’s value surged nearly 20% after a period of stability, which also led to a rise in the price of Dogecoin, as reported by CNBC.