3 Methods to Decide if a Stock Is a Buy

If you’re looking to take advantage of the fantastic opportunities in the markets, here are three methods to determine which stocks to buy.

| More on:
A person looks at data on a screen

Image source: Getty Images

There is a lot to research before deciding if a stock is a buy. Some of it will be to learn about how the business works. Parts of it will be focused on its industry. And you’ll even have to look at the risks and reasons why the stock might not be a buy.

Throughout your research, though, especially if you’re looking at a high-quality stock, there should be certain factors that stand out more than others. And often, these can help you decide whether or not to pull the trigger on buying a stock.

But of all the variables you’ll want to research, here are three of the most important considerations you’ll have to make to determine if a stock is worth a buy.

Looking at stocks’ operations and outlook can help you decide if it’s worth a buy

One of the most important ways to determine whether a stock is a buy or if you should look elsewhere has to do with its operations. You’ll also want to look at the company’s outlook and how much opportunity it has to expand those operations.

Looking at what a company does and how it makes money is extremely important to determine whether a stock is worth a buy.

This means looking for competitive advantages and how the company you’re researching has differentiated its product from its competitors.

You’ll also want to research and understand the economics of the company — both its microeconomics and how macroeconomic factors impact its ability to operate.

Another important factor to research is how resilient its sales are and whether or not it has recurring revenue. Any information you gather will be helpful in deciding whether the stock you’re looking at is a top-notch business or if you should move on and look for another investment.

Looking at its valuation can help you decide whether a stock is a buy

Another crucial method to decide if a stock is worth buying is by looking at its valuation. Just looking at its valuation won’t tell you much, though. You then have to compare it against several different factors to determine its value today.

One of the first methods is to look at the stock’s valuation now and compare it to its valuation in the past.

For example, Shopify (TSX:SHOP)(NYSE:SHOP) looks ultra-cheap. As you can see by its three-year chart below, the stock price hasn’t been this low since before the pandemic began.

However, an even closer look at Shopify shows its true value. Looking at Shopify’s price to sales (P/S), a popular measure for tech stocks that are still rapidly growing, the stock hasn’t been this cheap in well over three years.

Back in mid- to late 2019, well before the pandemic hit, Shopify was trading at a forward P/S ratio between 17 and 25 times. Today, Shopify has a forward P/S of just 7.4 times.

In addition to comparing stocks to themselves in the past, it’s also important to look at how they compare to their industry peers today.

Shopify has always been a premium stock and has often traded for slightly more than its competitors due to its exceptional growth potential.

Lastly, you’ll want to look at how the company has been performing lately against the entire market. When investors choose to pick their own stocks rather than invest in an index fund, it’s because they believe they can outperform the market.

Therefore, it’s always crucial to compare stocks against the market to find out what companies are overperforming, which are underperforming and where the best value is today.

Look at your portfolio exposure and what other opportunities are available

In addition to looking at the specifics of the target stock to decide if it’s worth an investment, you’ll also want to weigh it against your current portfolio and the exposure you already have.

For example, if you’re already overexposed to tech, and there are high-quality opportunities in consumer discretionary, it wouldn’t make sense to buy another tech stock like Shopify.

So, it’s crucial for investors to not just understand the stocks they are looking to buy but also their own portfolios to know which stocks will be the best to buy.

Fool contributor Daniel Da Costa has no position in any of the stocks mentioned. The Motley Fool has positions in and recommends Shopify.

More on Stocks for Beginners

Man looks stunned about something
Dividend Stocks

Don’t Overthink It: The Best $21,000 TFSA Approach to Start 2026

With $21,000 to start a TFSA in 2026, a simple four-holding mix can balance Canadian income with global diversification.

Read more »

Start line on the highway
Stocks for Beginners

You Don’t Need a Ton of Money to Grow a Successful TFSA: Here Are 3 Ways to Get Started

These TSX stocks have a higher likelihood of delivering returns that outpace the broader market, making them top bets for…

Read more »

a woman sleeps with her eyes covered with a mask
Dividend Stocks

The “Sleep-Well” TFSA Portfolio for 2026: 3 Blue-Chip Stocks to Buy in January

A simple “sleep-better” TFSA core for January 2026 can start with a bank, a utility, and an energy blue chip,…

Read more »

Person holds banknotes of Canadian dollars
Dividend Stocks

This Monthly Dividend Stock Could Make January Feel Like Payday Season

Freehold Royalties’ 8% yield can make your TFSA feel like “payday season,” but that monthly cheque is tied to energy…

Read more »

Piggy bank with word TFSA for tax-free savings accounts.
Dividend Stocks

Got $14,000? Here’s a TFSA Setup That Can Pay You Every Month in 2026

A $14,000 TFSA split between two high-income names can create a steady cash “drip,” but the real sleep-well factor is…

Read more »

Income and growth financial chart
Stocks for Beginners

The January Effect Is Real: 5 Canadian Stocks That Could Pop First

The January effect can reward patient buyers of “temporarily hated” TSX stocks if the businesses are still sound and the…

Read more »

dividend stocks bring in passive income so investors can sit back and relax
Stocks for Beginners

Top Canadian Stocks to Buy With $2,000 Right Now

Are you wondering what stocks could be set to outperform in 2026 and beyond? These four Canadian stocks look like…

Read more »

A close up color image of a small green plant sprouting out of a pile of Canadian dollar coins "loonies."
Dividend Stocks

This 7% Dividend Giant Could Be the Ultimate Retirement Ally

SmartCentres’ 7% monthly payout could anchor a TFSA, but only if you’re comfortable with tight payout coverage.

Read more »