A star icon.

Investing can feel a lot like that teeter-totter sometimes. Markets go up and down, and we’re all trying to find that sweet spot where the ride is enjoyable, not stomach-churning. I’d like to share a strategy that might help you find that balance: pair trading.

A Tale of Two Airlines

Let me tell you a story.

Back in the day, I had a friend named Mike who loved to fly. Not just as a passenger — he was obsessed with everything aviation. He noticed something interesting about two major airlines, let’s call them AirA and AirB.

Whenever AirA’s stock went up, AirB’s seemed to follow. When AirB had a bad week, AirA wasn’t far behind. It was as if these two were dance partners, moving in sync across the sky.

One day, an unexpected event caused AirA’s stock to dip — a temporary issue, nothing fundamental. AirB’s stock didn’t budge. Mike saw an opportunity. He bought shares of AirA and shorted shares of AirB, betting that the teeter-totter would balance out again.

Sure enough, a few weeks later, the skies cleared for AirA, and the stocks realigned. Mike’s trade paid off, not because he predicted the market, but because he understood the relationship between these two companies.

So, What Is Pair Trading?

Pair trading is a strategy where you invest in two related stocks — going long on one and short on the other — aiming to profit from the difference in their performances.

Think of it like this: You’re not betting on the overall market going up or down. You’re betting on the relationship between two companies staying consistent. If one stock dips more than it should relative to the other, you have an opportunity.

Why Consider Pair Trading?

Market Neutrality

Markets are unpredictable. But relationships between certain stocks can be more stable. Pair trading allows you to focus on these relationships, rather than the whims of the broader market.

Risk Management

By balancing a long position with a short one, you’re hedging your bets. If the market takes a tumble, your short position can offset losses from your long position.

Opportunities in Inefficiency

Markets aren’t always efficient in the short term. Emotions, news events, and other factors can cause temporary mispricings. Pair trading helps you capitalize on these moments.

The Mechanics Broken Down

Step 1: Finding Your Pair

Start with companies that are in the same industry and have historically moved together. Think Coca-Cola and Pepsi, Visa and Mastercard, or Ford and GM.

Visa / Mastercard in stock price $USD
Coca Cola / Pepsi in stock price $USD

Step 2: Understanding the Relationship

Look at how these stocks have behaved over time. Are they usually in sync? How often do they diverge, and by how much?

There are tools and charts that can help with this, but even a simple overlay of their stock prices can give you a sense.

Subscribe to our newsletter, and in future blog posts, we’ll demonstrate how to use Python to determine if two stocks have a cointegrating relationship.

Step 3: Spotting the Divergence

Wait for a moment when one stock moves significantly away from the other. Maybe there’s news that’s impacting one company more than the other, but you believe it’s a temporary blip.

Step 4: Executing the Trade

  • Go Long on the stock you believe is undervalued.
  • Go Short on the stock you believe is overvalued.

Step 5: Closing the Trade

Monitor the pair. Once they realign — or reach a point where you’re satisfied with the profit — you close both positions.

Understanding the Human Element

At its core, pair trading is about understanding human behavior.

We’re prone to overreacting. A piece of news can send a stock tumbling, even if the long-term prospects of the company remain solid. By stepping back and focusing on the bigger picture — the relationship between two companies — you can make more measured decisions.

A Personal Insight

I’ve always found that investing is less about numbers and more about understanding stories. Every stock represents a company, and every company is run by people, serving people.

When you focus on the relationships — how companies interact, compete, and coexist — you start to see patterns that aren’t immediately obvious on a spreadsheet.

Things to Keep in Mind

Not All Pairs Are Created Equal

Some companies might seem related but behave differently due to factors beneath the surface. Always dig deeper.

Costs and Logistics

Shorting a stock isn’t always straightforward. There can be borrowing costs and other fees. Make sure you understand these before diving in.

Stay Updated

Companies can change direction. A strategic shift, a new product line, or changes in leadership can alter the dynamics. Keep an ear to the ground.

Reflecting on Your Goals

Before trying any new strategy, it’s worth asking yourself:

  • What are my investment goals?
  • How much time can I dedicate to monitoring my investments?
  • Am I comfortable with the risks involved?

Pair trading isn’t a guaranteed win. Like any strategy, it has its risks and rewards. It’s about finding balance — not just in your portfolio, but in how investing fits into your life.

Practical Steps to Get Started

Educate Yourself

Read up on industries that interest you. The more you understand about how companies operate, the better you’ll be at spotting opportunities.

Start Small

Dip your toes before jumping in. Maybe practice with a virtual trading account or allocate a small portion of your portfolio to this strategy.

Keep It Simple

Avoid overcomplicating things. Focus on a few pairs that you understand well.

Be Patient

Good opportunities don’t come every day. And that’s okay. Investing isn’t about constant action; it’s about making thoughtful decisions when the time is right.

Embracing a Balanced Perspective

There’s a saying I like: “It’s not about timing the market, but time in the market.” Pair trading adds another layer — it’s about understanding the market’s dance partners and how they move together over time.

We can’t predict the future. But by observing, learning, and staying curious, we can make informed decisions that align with our goals.

Final Thoughts

Investing is a personal journey. What works for one person might not work for another. Pair trading is just one tool in a vast toolbox. It might resonate with you, or you might find that another approach suits you better.

Either way, the key is to keep learning, stay humble, and remember that every investor — no matter how experienced — started somewhere.

May your teeter-totter always find its balance.

Disclaimer: This article is for informational purposes only and does not constitute financial advice. Investing involves risk, and it’s important to conduct your own research or consult with a financial professional before making investment decisions.

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Disclaimer: The information provided in this article is for educational purposes only and should not be considered as financial advice. Trading involves risk, and it is important to conduct thorough research and seek professional guidance before making any investment decisions. Prospective investors are encouraged to perform their own due diligence or consult a financial advisor before making investment decisions.