Core Insights - Nvidia has initiated a public relations campaign to defend its $4.5 trillion valuation against skepticism, which has decreased from a historical high of $5 trillion [1] - The company issued a detailed memo to sell-side analysts, addressing criticisms from Michael Burry and other authors on Substack [1] - Burry, known for shorting the U.S. housing market before the 2008 financial crisis, has intensified his criticism of Nvidia in recent weeks [1] - A report from The Information indicated that Meta Platforms is in discussions with Google about using AI chips that compete with Nvidia's semiconductors, leading to a decline in Nvidia's stock price [1] - Nvidia publicly responded on social media, expressing happiness for Google's success while asserting that its chips remain a generation ahead of competitors [1] Summary by Sections Company Valuation - Nvidia's current valuation stands at $4.5 trillion, down from a peak of $5 trillion [1] Analyst Response - The company provided a memo to analysts to counteract negative claims made by critics, particularly addressing points raised by Michael Burry [1] Market Competition - Reports suggest that Meta is exploring alternatives to Nvidia's chips, specifically considering Google's AI chips, which has impacted Nvidia's stock performance [1] Public Relations Strategy - Nvidia's response on social media highlights its competitive edge, emphasizing the superiority of its technology over rivals [1]