3 Investing Rules I Follow

Learn about three simple rules that will help you maximize your returns.

Self-directing your own investments can be tough. From learning the ins and outs of each sector, reading balance sheets, listening to earnings calls, there is so much information to grasp. However, following a set of guidelines to invest by and sticking to them can help you come out on top.

In this article, I will review three rules that have helped me — and hopefully you can apply these to your own investment strategies.

Invest in what you know

There are eleven sectors in the stock market: consumer discretionary, consumer staples, energy, financials, health care, industrials, information technology, materials, real estate, telecommunication, and utilities. It is often taught to diversify, but over-diversification can be a quick way to find yourself in trouble.

Peter Lynch, well-known for his 29% annualized rate of return as the manager of the Magellan Fund, has been known to preach this concept. Lynch was a believer in investing in industries where you have an advantage over the average investor.

For myself, as someone more exposed to technology, it is only natural that I find myself investing in companies such as Shopify and Lightspeed. If you work in retail, perhaps you would be more comfortable investing in Metro or Loblaw.

By sticking with industries that you are familiar with, it will be easier to understand business models, balance sheets, and which companies have a competitive advantage.

Remove emotions from the equation

This is much easier said than done, but it is very important to remember in case another market crash occurs. On March 12, during the market crash caused by the COVID-19 pandemic, the S&P/TSX Composite Index dropped by 12.34%, marking the largest single day drop since 1940.

Meanwhile, in the United States, the top six largest drops in the Dow Jones Industrial Average all occurred during the 2020 pandemic. Big moves by the market as witnessed during these events can easily unnerve investors.

What can be done to help you invest without emotion? One strategy would be to decide how much money you can afford to invest every other week, or every month, and consistently contribute that same amount no matter the economic condition.

Doing so would keep you from being hesitant to buy during all-time highs and missing days that provide excellent returns. It would also ensure that you take advantage of market lows, instead of waiting for “a better opportunity” and missing out on potential gains.

Sell as little as possible

There is a very cheesy expression that I believe is true: “Your portfolio is like a bar of soap. The more you handle it, the smaller it becomes.” This expression states that the more active you are, the tougher it will be to see market-beating returns.

In 2000, Brad Barber and Terrance Odean published a study investigating this concept. The authors found that there was an inverse relationship between portfolio turnover and performance, as portfolio turnover increases, the rate of return decreases.

The Motley Fool generally preaches to buy companies with the intention of holding them forever. This concept can be put into practice by exploring the recommendations in services offered by Motley Fool Canada.

There are an incredibly larger proportion of buy recommendations than sells. By reducing the number of sells, you allow more runway for your positions to grow and you also cut down on fees (e.g., transaction fees), which can eat away at your returns.

Foolish takeaway

Investing is a tough endeavour. By sticking to a systematic approach, you will be able to navigate the market more easily. Consider investing in industries you are familiar with, removing your emotions from the equation, and selling shares as little as possible and see how much better your returns become.

Fool contributor Jed Lloren owns shares of Lightspeed POS Inc and Shopify. Tom Gardner owns shares of Shopify. The Motley Fool owns shares of and recommends Shopify and Shopify. The Motley Fool owns shares of Lightspeed POS Inc.

More on Investing

chart reflected in eyeglass lenses
Dividend Stocks

A Canadian Stock to Watch as 2026 Kicks Off

This Canadian stock is perfectly positioned to benefit from the country’s growth plan and infrastructure spending in 2026.

Read more »

Investor wonders if it's safe to buy stocks now
Dividend Stocks

The Best Canadian Dividend Stocks to Buy and Hold Forever in a TFSA

Here are undervalued TSX dividend stocks TFSA investors can buy hold in December 2025.

Read more »

tsx today
Stock Market

TSX Today: What to Watch for in Stocks on Tuesday, December 16

Falling oil and metals prices may weigh on the TSX at the open today, even as investors await BoC governor…

Read more »

Printing canadian dollar bills on a print machine
Stocks for Beginners

Invest $10,000 in This Dividend Stock for $333 in Passive Income

Got $10,000? This Big Six bank’s high yield and steady earnings could turn tax-free dividends into serious compounding inside your…

Read more »

Real estate investment concept with person pointing on growth graph and coin stacking to get profit from property
Dividend Stocks

2 Dividend Stocks Worth Owning Forever

These dividend picks are more than just high-yield stocks – they’re backed by real businesses with long-term plans.

Read more »

House models and one with REIT real estate investment trust.
Dividend Stocks

3 Top Canadian REITs for Passive Income Investing in 2026

These three Canadian REITs are excellent options for long-term investors looking for big upside in the years ahead.

Read more »

the word REIT is an acronym for real estate investment trust
Dividend Stocks

Use Your TFSA to Earn $184 Per Month in Tax-Free Income

Want tax-free monthly TFSA income? SmartCentres’ Walmart‑anchored REIT offers steady payouts today and growth from residential and mixed‑use projects.

Read more »

dividends can compound over time
Dividend Stocks

Passive Income: Is Enbridge Stock Still a Buy for its Dividend Yield?

This stock still offers a 6% yield, even after its big rally.

Read more »