It's emotionally difficult to sell losers during a down year. Cassel uses a mental hack to force objectivity: he asks himself how he would act if he were having a great year. The answer is almost always to cut the loser immediately. This reframe helps overcome the biases that lead to holding on too long.

The common advice to 'buy more cheaper' when a stock falls is a flawed strategy. It often leads to allocating more capital to your worst ideas and compounding mistakes. Instead of automatically adding to losers, the bar for re-investment should be exceptionally high.

An investor's emotional makeup dictates their strategy when a stock declines. You must commit to one of two paths: selling quickly to cut losses or buying more when the price is low. Trying to be both leads to poor decisions and emotional turmoil.

When selling a losing position during a drawdown, it's crucial to determine if the decision is driven by the emotional inability to endure more pain (pain management) or a rational assessment of future risk (risk management). Confusing the two leads to poor outcomes.

To combat the emotional burden of binary sell-or-hold decisions, use the "Go Havsies" method. Instead of selling a full position, sell half. This simple algorithm diversifies potential outcomes—you benefit if it rises and are protected if it falls—which significantly reduces the psychological pain of regret from making the "wrong" choice.

True investment maturity isn't about holding through drawdowns. It's about recognizing when new information invalidates your thesis and selling immediately. The common instinct to defend a position by buying more is a costly mistake that turns event-driven plays into distressed holdings.

During a period of underperformance, the common instinct to double down on losers to prove the market wrong is a path to ruin. The correct, albeit counterintuitive, response is to get more diversified. Sell a loser to free up mindshare and add more 'batters to the lineup' to increase the chances of a win.

We focus on how to win, but failure is inevitable. How you react to loss determines long-term success. Losing money triggers irrational behavior—chasing losses or getting emotional—that derails any sound strategy. Mastering the emotional response to downswings is the real key.

A small losing position can occupy a large portion of your mental bandwidth. Selling a stock that is 1% of your portfolio but 10% of your mental energy is often a smart decision, freeing you to focus on better opportunities.