Griffin Warns: 'Get Over' Your Emotional Attachment to Stocks
Billionaire investor Ken Griffin's firm Citadel has been helping Situational Awareness recover from significant losses, but many market-watchers seem surprised by Aschenbrenner's quick return to making big bets. Griffin, however, likely sees this as a necessary part of the business.
During an appearance on the Founders Podcast in 2025, Griffin emphasized the importance of taking losses and selling: 'You're always selling,' he said. 'And if you don't like to sell, here's my advice: Get over it.'
This philosophy is crucial for traders navigating today's volatile markets, where concentration risk in AI-related stocks is extreme and valuations leave little margin for error. The recent near-collapse of Situational Awareness illustrates the consequences of refusing or being unable to sell.
Griffin's message is particularly urgent given the current market environment, with the S&P 500 Index ($SPX) up nearly 13% year-to-date as of early August 2026 and elevated CAPE ratios between 40 and 41. Traders face a market where concentration risk in AI-related stocks is extreme, and valuations leave little margin for error.
The practical application of Griffin's philosophy requires traders to distinguish between investing and trading timeframes. A buy-and-hold investor can afford patience through drawdowns because their horizon extends decades. An active trader operating with leverage, concentrated positions, or short-term objectives cannot.