Why it’s a Bad Idea to Invest in the TSX Index

The S&P/TSX Composite Index (TSX:^OSTPX) is a great source for investment ideas but a bad investment. This is why.

The S&P/TSX Composite Index (TSX:^OSTPX), or TSX index for short, covers about 95% of the Canadian equities market. On initial thought, the index may seem diversified because of that.

However, the devil is in the details. The problem is the TSX index is concentrated in specific sectors, which actually makes it not so diversified and potentially a bad idea to invest in.

The TSX index is not very diversified

Currently, the TSX index’s top four sectors are financials (nearly 36% of its weighting), energy (more than 18%), materials (11%), and industrials (nearly 10%).

It has about 5% or less weighting in each of the remaining sectors, including consumer discretionary, communication services, utilities, consumer staples, information technology (IT), and health care.

That doesn’t seem very balanced, does it?

Financials is a key sector in Canada. So, not surprisingly, four of the top 10 holdings in the TSX index are the largest Canadian banks: Royal Bank of Canada, Toronto-Dominion Bank, Bank of Nova Scotia, and Bank of Montreal.

Many Canadian investors already own Canada’s big banks, which would make them double exposed to the banks if they also hold the TSX index.

think, plan, and act to work towards your financial goals

What the TSX index lacks

The TSX index lacks in the relatively stable sectors of consumer discretionary, communication services, utilities, and consumer staples, which conservative or retired investors might want a higher concentration in.

The index is also poorly exposed to the IT sector with only a puny 3.18% “concentration” in it. In my opinion, this sector is a growth area that investors should highly consider getting a meaningful exposure to. They can gain exposure through a technology ETF or buying specific tech stocks, such as Microsoft, OpenText, or Shopify when they seem to be relatively cheap.

Think about the high-growth areas of artificial intelligence, augmented reality, cyber security, the internet of things, automation, etc. They are all a part of IT.

Investor takeaway

The TSX index is not diversified. It’s highly concentrated in the financials and energy sectors and lacks in the consumer discretionary, communication services, utilities, consumer staples, IT, and health care sectors. However, the index is a good gauge of the Canadian market.

TSX index’s top holdings, including Enbridge, Canadian National Railway, Suncor Energy, TransCanada, Brookfield Asset Management, and BCE are a great place to source for stock ideas, but investors should only consider buying them when they trade at good valuations.

Investors should plan for the ideal allocation for each sector in their portfolios and decide which ETFs or stocks make the best fit for the allocation.

Of course, the sector allocation and what goes in it will likely change over time because the economic and business environments are always changing.

Teresa Kersten, an employee of LinkedIn, a Microsoft subsidiary, is a member of The Motley Fool’s board of directors. Fool contributor Kay Ng owns shares of Bank of Nova Scotia, BROOKFIELD ASSET MANAGEMENT INC. CL.A LV, Enbridge, Open Text, Shopify, Suncor Energy, Toronto-Dominion Bank, and TransCanada. David Gardner owns shares of Canadian National Railway. Tom Gardner owns shares of Shopify. The Motley Fool owns shares of Brookfield Asset Management, BROOKFIELD ASSET MANAGEMENT INC. CL.A LV, Canadian National Railway, Microsoft, and Shopify. Bank of Nova Scotia, Canadian National Railway, Enbridge, Open Text, and Shopify are recommendations of Stock Advisor Canada.

More on Investing

four people hold happy emoji masks
Tech Stocks

5.9% Dividend Yield! I’m Buying This TSX Stock and Holding for Decades

Down almost 75% from all-time highs, Enghouse stock offers significant upside potential and a tasty dividend yield.

Read more »

Piggy bank wrapped in Christmas string lights
Bank Stocks

3 Canadian Bank Stocks Offering Decades and Decades of Dividends

These Canadian bank stocks have paid dividends for decades. The reliability of their payouts makes them compelling income stocks.

Read more »

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

2 Recession-Resistant Dividend Stocks Perfect for Life-Long TFSA Income

CP, with its continent-spanning rail, and BMO, with its centuries-long track record, are two recession-resistant dividend anchors for your TFSA.

Read more »

top motley fool stocks to buy in december 2025
Top TSX Stocks

Just Released: 5 Top Motley Fool Stocks to Buy in December

Gold and AI have been getting all the buzz, but another behind-the-scenes investing trend looks very promising this month.

Read more »

Canadian dollars in a magnifying glass
Dividend Stocks

Is Exchange Income Stock a Buy for its Dividend?

Is Exchange Income’s tempting yield a durable monthly paycheque, or a warning sign in a tougher economy?

Read more »

tsx today
Stock Market

TSX Today: What to Watch for in Stocks on Wednesday, December 10

After trimming losses, the TSX could swing today as markets await clarity from the BoC and Fed policy decisions and…

Read more »

hand stacks coins
Dividend Stocks

3 Top Dividend Stocks to Buy Today and Count On for Years

These top dividend stocks can maintain their current payouts and increase their distributions regardless of market downturns.

Read more »

buildings lined up in a row
Dividend Stocks

This 6% Dividend Giant Could Be the Perfect Retirement Partner

Discover how to achieve your ideal retirement. Plan ahead, invest wisely, and create multiple income sources for peace of mind.

Read more »