The Psychology of Investing: Avoiding Traps That Cloud Your Judgment
A Guest Post by Sara, The High-Performing Trader
Dear Reader: One of the best things about Substack is how it brings together investors and traders who are passionate about refining their craft. Through this platform, I had the pleasure of connecting with
from , whose insights into trading psychology and decision-making have helped many navigate the markets with greater discipline. Today, she’s sharing a powerful piece on the mental traps that can cloud judgment and lead to costly mistakes—offering practical strategies to stay focused and make better investing decisions. I think you’ll find her perspective both insightful and actionable. Enjoy! Over to Sara.
A trading client of mine—an options trader—fell into a psychological trap that many investors unknowingly experience. Because options don’t have hard stops due to delta and time decay, he was uncertain about the exact size of his losses. But he still had control.
His mistake? Holding onto losers too long while his winners experienced huge drawdowns before eventually hitting profit.
He believed this was a sign of patience, thinking he was just “waiting out” the volatility. But patience wasn’t the issue—his approach to trading was too much like investing. He relied on market fundamentals to justify holding his losing trades, assuming they would eventually recover.
This worked—until it didn’t. One day, he took a loss so large he couldn’t recover from it.
Trading is about timing; investing is about the business itself.
And that represents one of the biggest difficulties in investing—it’s a long-term game that requires strong critical thinking about a company’s value, which isn’t always reflected on the chart.
The job of an investor is to identify true value, compare it to the actual market price, and evaluate the gap between them. But this process is often blurred by psychological traps that distort rational decision-making.
In the next section, we’ll analyze 5 most common investment traps, why they happen, and how to avoid them.
Trap #1: “It’s Cheap, So It Must Be a Bargain”
A low price doesn’t mean value. Many fall into the trap of buying a declining company just because it's cheap, rather than because it has strong free cash flow or a durable competitive advantage.
A simple way to test this is asking yourself: If this stock were priced higher, would I still buy it? If the only reason you’re interested is the low price, you may be walking into a value trap.
Cheap doesn’t mean valuable. In both trading and investing, price alone is not a strategy.
Trap #2: “I Can’t Admit I Was Wrong”
When a stock declines, many investors hold onto it just to avoid admitting they made a mistake. The truth is, the more research, time, and energy put into the decision, the harder it is to let go because there’s more ego involved. If traders attach to their trades, investors attach even more strongly.
It isn’t just about valuation—it’s about being willing to change your mind when the fundamentals shift.
Before investing, define clear exit criteria: What would make me reconsider my thesis? If the facts change, your decision should, too.
Trap #3: Storytelling Over Substance
Some investors fall in love with a company’s narrative—the next big thing in AI, electric vehicles, biotech—without analyzing the actual numbers. They buy into hype rather than financials.
Take AI stocks, for example. In the past year, companies with "AI" in their name or investor presentations have surged in valuation, even if they have no real AI-driven revenue model or clear competitive advantage. A prime example is C3.ai (AI).
C3.ai positioned itself as a major AI enterprise software player, riding the wave of investor enthusiasm around artificial intelligence. However, looking beyond the narrative, the fundamentals told a different story—declining revenue growth, heavy reliance on a few large contracts, and unproven scalability. Despite this, the stock soared as retail investors poured in, captivated by the AI boom.
Contrast that with Nvidia (NVDA), which not only benefits from AI hype but has tangible revenue growth, a strong competitive advantage in AI chip production, and substantial cash flow generation.
Every investment should be backed by solid fundamentals.
Separate hype from reality—look at revenue, margins, cash flow, and valuation. If an investment feels too exciting, take a step back and ask, “Is this a good business, or just a good story?”
A good narrative doesn’t mean a good trade or investment. In both cases, research trumps hype.
Trap #4: Fear of Selling at the Bottom
A stock drops, and panic sets in. Investors start questioning if they should sell—not because of new information, but because of fear. They wonder, “What if I sell and it rebounds?”
Investors feel the pain of losses twice as strongly as the pleasure of gains.
To counter this, separate emotions from decision-making. Instead of reacting to price movements, look at the company’s fundamentals. Has anything actually changed?
Trap #5: FOMO Overvaluation
In trading, traders chase a breakout without waiting for a pullback or confirmation, only to see the price reverse right after entering. The parallel in the investing world is that investors buy at extreme valuations just because a stock is running.
But buying into the hype without valuation discipline is a recipe for disaster.
The challenge is distinguishing the hype from reality, which requires you to ignore market noise and focus on what matters.
In the heat of the moment, this distinction is hard to make—emotions are running high, and you enter survival mode, which puts you psychologically and physiologically at a disadvantage. Traders feel an urge to act under these conditions, but the most important thing to realize is that you always have a choice – you don't need to act right now. If you do, you’ll most likely regret it later. So aim to regulate emotion first instead of putting pressure on yourself to do the right thing!
The Key to Long-Term Success: Mastering Your Own Psychology
Your biggest edge isn’t just stock selection—
TL;DR – How to Avoid Investment Traps
Don’t mistake cheap for valuable—a low price isn’t always a bargain.
Be willing to change your mind when the facts change.
Distinguish a great business from a great story—cash flow and fundamentals win long-term.
Separate emotions from decisions—ask, “Has anything actually changed?”
Fear overpaying more than missing out—hype fades, valuations matter.
One Last Question to Challenge Your Thinking:
Think about your last investment—was your decision based on fundamentals or did emotion play a role?
If you had to explain your reasoning in one sentence, would it hold up under scrutiny?
If you want to dive deeper into the psychology behind investing and trading, subscribe to The High-Performing Trader.
Thank you, Kris, for the opportunity to share these insights with your audience!
With love,
Sara
 | A guest post by
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Thank you, Kris!
Great article! Do you have any recommended books?