Buying the dip—is it wise or foolish? Warren Buffett can do it, but you can't.

If you’ve ever experienced paper losses on an investment and kept adding funds in an attempt to lower your average cost, you’ll understand the complex mix of anxiety, frustration, and a faint glimmer of hope. With each additional purchase, you tell yourself this is “being greedy when others are fearful,” embodying the true spirit of value investing. But when the stock price continues to fall and your losses snowball, your confidence begins to waver. You start to wonder: Am I smartly bottom-fishing, or just foolishly taking a flying knife?

The confusion stems from the fact that “buying more as it falls” can mean very different things depending on the context. It can lead to paradise or hell. We need to look beyond the surface of the behavior and touch the hidden thread that ultimately determines the outcome. Before doing so, we must accept a harsher reality: even if you understand all the right principles, even if you’re dealing with a fundamentally sound company, for most people, this path is still a narrow road leading to the abyss.

Paper losses distort reality, anchoring our attention to the past transaction prices. Your brain unconsciously calculates: if it drops another 10%, how much should I add at what price to bring my average cost back? How much of a rebound is needed to break even?

This calculation traps you in a subtle psychological pit — your entire thinking is fixated on “breaking even,” forgetting the most fundamental question: Is this company still worth owning at this moment? That’s the danger of cost anchoring. It turns an independent investment decision into a contest with your past self. You’re no longer buying based on future profit potential but on how much you’ve already lost. Your opponent isn’t the market; it’s the self that made the initial purchase.

True value investing requires an almost ruthless zero-based mindset. Every buy should be a fresh, independent judgment. Ask yourself: if I were completely new to this stock, with no prior position, at the current price, would I still want to buy? If your answer is hesitant or uncertain, then any further investment is essentially paying for your past mistakes, not betting on future value.

Even if you overcome cost anchoring, think with a zero-based approach, and, after careful analysis, conclude that the company’s fundamentals remain solid and the price decline is just a market overreaction — congratulations, you are on the right track. But this is only the first step. The real test has just begun.

When will the price reverse? No one knows. No one can predict how long Mr. Market’s madness will last. Three months? a year? three years? five years? In extreme historical moments, the time stocks are abandoned by the market can exhaust anyone’s patience. You’re not competing against the company; you’re competing against time, and time is the most unforgiving adversary for ordinary investors.

This is the deepest divide between theory and reality. The most outstanding value investors often have a long-term vision, substantial capital, and funds capable of enduring cycles. They can wait three, five, even ten years. For them, the concept of time cost is entirely different from that of most people.

But what about ordinary investors? Your funds may be earmarked for a specific purpose — a down payment in a few years, your children’s education fund, or emergency savings. When this money is locked in a position that refuses to turn around, every sleepless night, every awkward answer to family questions, and every missed opportunity gnaws at your mental resilience. Time cost for ordinary people isn’t just an abstract concept from textbooks; it’s a dull blade made of real anxiety, opportunity cost, and pressure, daily slicing away at your willpower.

A more hidden challenge is the loneliness of fighting the market. When you keep buying on dips, you’re using your own hard-earned money to oppose the collective consensus of the market. The market’s continuous decline tells you: you’re wrong. Your friends mock you, the media paints a bleak picture, analysts downgrade ratings. You can soothe yourself with “Mr. Market is crazy,” but this comfort grows increasingly hollow as losses mount day after day.

Humans are social animals; we crave recognition and fear rejection. Standing against the market for the long haul requires extraordinary mental strength and near-obsessive conviction. This quality isn’t gained by reading a few classic books; it requires talent, experience, and repeated trials through bull and bear markets. Most people, from the start, simply lack the qualification to play this game.

Thus begins a tragic cycle. Your initial idea is correct, your judgment is sound, but your psychological resilience can’t keep pace with your conviction. Each drop adds pressure; each additional buy increases your gamble. Eventually, in the darkest moment, just before the dawn, your mental defenses collapse.

You start to doubt: Did I get it wrong? Is there some bad news I don’t know? Once self-doubt takes hold, it’s like an ant hole in a dam — it will eventually cause a breach. You choose to cut your losses and exit, only to watch the stock reverse shortly after you sell. You fall before dawn, not because your judgment was wrong, but because your heart, ahead of the market, has already broken.

This is the cruelest truth of the “adding to paper losses” game. Even if you are on the right side, even if the company’s fundamentals are rock solid, for most people, this internal war is a losing battle. Having the right idea doesn’t guarantee the right outcome, because the person executing that idea is subject to human weaknesses and real-world constraints.

So, how should we view this behavior? Is it always foolish? Clearly not. But if “wisdom” is defined as a pattern of behavior that works with high probability for most people, then constantly buying on dips to lower costs is, for most ordinary investors, a dangerous trap. It requires conditions — a long enough investment horizon, capital that can withstand ongoing losses, and nerves of steel — that most people simply don’t possess.

True wisdom may lie not in daring to buy during downturns, but in honestly recognizing oneself. Recognize that you are just an ordinary person, that your funds are time-constrained, and that your psychological capacity has limits. With this clear self-awareness, you might make a seemingly less “value-investing” decision: to give up on the left side of the chart, stop buying, and wait patiently for the trend to clarify and market sentiment to recover before acting. You might pay a higher price, sacrifice some potential gains, but gain greater certainty, less mental torment, and a higher chance of surviving this game.

The essence of investing wisdom isn’t about how much you can earn but about how long you can stay in the game. For those with deep moats, buying quality companies on dips within their circle of competence is wise because they have the capital and temperament to withstand time and market fluctuations. But for most ordinary investors, admitting their limitations and choosing a safer, more suitable approach is equally wise — perhaps even a deeper wisdom.

The true cost of adding to paper losses isn’t just financial; it’s the false sense of control it creates, convincing you that you’re actively practicing your principles, when in fact, you’re just building a tombstone for your biases and obsessions.

Next time you face paper losses and consider adding more, pause and ask yourself three questions: Is my judgment really correct? How long can I wait? Can I handle the inner pressure? If any answer is hesitant, trust that leaving or waiting is the smartest choice right now.

Remember: the market will never pity you for your losses; it only cares about one thing: whether you are still alive.

Author’s note: These are personal opinions for reference only.