Warren Buffett warns retail investors to avoid buying hype-driven mega-IPOs at peak excitement.

Warren Buffett advises retail investors to be cautious about investing in highly hyped mega-IPOs like SpaceX and OpenAI, as these often come with inflated valuations and peak market excitement. He highlights that Berkshire Hathaway rarely buys new IPOs due to high selling incentives and overvaluation at launch. The example of Snowflake's 2020 IPO shows how retail investors often buy at much higher prices than the IPO price, leading to modest returns compared to broad index funds like the S&P 500. Buffett's key lesson is to focus on valuation and avoid buying driven by fear of missing out, as better entry points often appear later.