Getting out of your own way: how can investors conquer Confirmation Bias?

Confirmation bias, the malaise and the medicine for investors.

The bias that really bites

Investing can be a formidable pursuit, riddled with challenges and hurdles that even the most seasoned of investors must face. One such obstacle that often stands in our path is confirmation bias. It’s a cognitive bias that tempts us to seek out information that aligns with our preconceived beliefs, while conveniently ignoring or downplaying evidence that challenges them. Recognising and addressing this bias is crucial for making sound investment decisions with confidence.

So, let’s delve into the world of confirmation bias and explore how it can inadvertently hinder our investment due diligence. The danger lies in two main tendencies: prematurely ceasing our search for facts when our personal opinion feels vindicated, or selectively seeking new data that confirms our existing views.

Imagine finding yourself on a path where you feel comfortable and secure in your investment decision. It’s only natural to want to believe you’ve made the right choice. However, complacency can prove to be a silent saboteur. When confirmation bias takes hold, it may deceive us into thinking we’ve gathered enough evidence to validate our opinion, causing us to halt our search prematurely. Consequently, we may miss vital information that could potentially alter the course of our investments. It’s crucial to remain vigilant, questioning whether we’ve genuinely explored all angles before settling on a conclusion.

Moreover, confirmation bias can lead us down the treacherous path of cherry-picking data. Like a child in a sweet shop, we’re drawn to information that supports our existing beliefs, while conveniently disregarding anything that challenges them. It’s a natural human inclination to seek affirmation and avoid discomfort. However, successful investing demands intellectual honesty and the willingness to confront opposing viewpoints. By doing so, we open ourselves up to a broader perspective, gaining insights that may not have been immediately apparent.

What is “falsifiability”?

Here’s where something called falsifiability comes to the rescue. Falsifiability is the art of questioning our own beliefs and assumptions. It’s a potent tool that encourages us to step back and examine our beliefs with unwavering objectivity. Instead of stubbornly defending our opinions, we should ask ourselves a simple yet transformative question: “What evidence would I need to see to prove myself wrong?”

By posing this question, we create space for genuine introspection and critical thinking. It’s about challenging our assumptions and being receptive to the possibility of being mistaken.

Falsifiability acts as a guiding light, steering us away from the perilous cliffs of confirmation bias. It empowers us to actively seek out diverse perspectives, engaging in thoughtful conversations and embracing dissenting opinions. By doing so, we broaden our knowledge and sharpen our analytical skills. We become better equipped to evaluate contradictory evidence, objectively weighing its merits and integrating it into our decision-making process.

Embracing the essence of falsifiability requires a calm confidence. It’s about recognising that our investment journey is a continuous learning process, and we must remain adaptable. Successful investors understand that being open to revising our investment thesis based on new evidence is not a sign of weakness but a testament to our commitment to making well-informed decisions.

How investors beat the bias

To break free from the pernicious clutches of confirmation bias, the answer is to become a “Grand Master of Falsifiability” Here are Five Steps you’ll need to beat confirmation bias:

  1. Embrace intellectual humility: Recognise that we are all susceptible to biases, and be open to the possibility that our initial beliefs may be flawed. Accept that being proven wrong is not a sign of failure but an opportunity for growth.
  2. Seek diverse perspectives: Surround yourself with individuals who hold differing opinions and challenge your assumptions. Engage in thoughtful discussions, debates, and seek out contrarian viewpoints. By actively seeking disconfirming evidence, you broaden your understanding and gain a more comprehensive view of the investment landscape. Evaluating investments solo without a due diligence framework is a bad idea. Always.
  3. Diligently evaluate contradictory evidence: Instead of dismissing contradictory information, examine it closely. Assess its validity, consider the source, and weigh it against your initial beliefs. Engaging with dissenting opinions can lead to breakthrough insights and help you make more well-rounded investment decisions.
  4. Conduct thorough analysis: Take a comprehensive approach to due diligence. Evaluate both the positive and negative aspects of the investment opportunity. Consider various factors such as financial performance, market trends, competitive landscape, regulatory environment, and potential risks. By conducting a thorough and unbiased analysis, you can make more informed choices.
  5. Stay adaptable: Be willing to adapt your investment thesis based on new evidence and insights. Don’t cling rigidly to your initial beliefs. Be agile and responsive to changing circumstances. The ability to revise your opinions in light of new information is a hallmark of successful investors.

By incorporating the principle of falsifiability into your investment due diligence process, you can navigate the treacherous waters of confirmation bias. Remember, it’s not about proving yourself right; it’s about seeking the truth, even if it challenges your preconceived ideas.

So, as you embark on your investment journey, keep a spirit of calm confidence close at hand. Embrace the power of falsifiability, challenging your beliefs with unwavering poise. Seek out diverse perspectives, explore the vast landscape of knowledge, and remain open to the potential of serendipitous discoveries along the way.


Confirmation bias may present a persistent challenge, but armed with the power of falsifiability and a mindset rooted in calm confidence, we can overcome its grip. Let’s navigate the investment landscape with intellectual honesty and the courage to challenge our own biases. By doing so, we’ll make better-informed decisions and set ourselves on a path to investment success.

Your portfolio will thank you for it.


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