Why your portfolio return might not match the stock market

For many people, investing brings to mind the stock market, and well-known indexes like the S&P 500, the Dow, the Nasdaq and the TSX. These key benchmarks provide a useful snapshot of what’s happening in specific parts of the market at a given time:

• The S&P 500 holds 500 of the largest U.S. companies. It’s often seen as “the” benchmark for the U.S. economy.
• The Dow Jones Industrial Average is a smaller group of 30 large, established U.S. companies. “Blue-chip” is a term often used with the Dow.
• The Nasdaq Composite is a broad index, heavily tilted toward technology and growth companies
• Canada’s main benchmark, the S&P/TSX Composite, reflects domestic sectors like financials, energy and materials (like banks, oil and mining companies)

If you compare your portfolio’s performance to one of these indexes, you might notice a difference. But that gap isn’t always a sign that something is wrong. It simply reflects the design of your investment strategy.

What the benchmarks show (and don’t show)

While each index contains stocks from different sectors, individual markets may not reflect the global economy as a whole.

The S&P 500, for example, represents a large portion of the U.S. stock market, but it doesn’t include smaller companies, international investments, or other asset classes such as bonds and cash. Its performance, particularly in the short term, can also be influenced by a relatively small number of large companies. We see this with sectors like technology, where AI-related stocks swing dramatically based on earnings and changing growth expectations.

At the same time, Canada’s market has a very different composition. The TSX is more heavily weighted toward financials, energy and natural resources, which means its performance can diverge meaningfully from U.S. markets.

These structural differences are a key reason why a diversified portfolio may not align with any single index.

Why “tracking the index” isn’t always the full picture

Some investment strategies aim to closely follow the performance of a specific index. This can be effective at capturing broad market returns, but it comes with limitations. Index-tracking strategies are built to mirror the market, meaning they generally move in line with it and maintain the same exposures regardless of changing conditions. The strategy might not adjust to reduce risk during downturns or reposition in response to shifting market environments.

By contrast, a diversified, professionally managed portfolio takes a broader approach. It often includes a mix of asset classes – such as equities, fixed income, and cash – and shifts allocations over time to suit changing conditions. It’s a way of managing risk more actively, rather than simply reflecting market movements. This approach is effective during periods of volatility, when markets are less predictable.

The role of professional investment management

Diversified portfolios are monitored by investment professionals. They have experience assessing market and economic conditions, evaluating risks and opportunities, and adjusting to keep portfolios aligned with objectives. Ongoing oversight is one of the key services in professional investment management. It can help maintain a long-term focus and reduce the likelihood of emotional reactions to headlines – a mistake that often causes investors to sell during downturns or chase performance at the expense of their ultimate goals.

Key take-away: It always comes back to your plan

Ultimately, your investment strategy isn’t built around a single index – it’s built around you. Your financial goals, time horizon and comfort with risk shape the makeup of your portfolio. If those factors haven’t changed, short-term performance differences don’t necessarily mean you need to change direction.

As your circumstances evolve, your portfolio can evolve as well. Adjusting your investment mix and overall allocation can help ensure your strategy continues to reflect your needs.

It’s easy to focus on well-known benchmarks like the S&P 500, especially during periods when performance diverges. But most portfolios are not designed to track a single index. They are built to navigate changing conditions over time. If your goals and risk profile remain consistent, differences in performance simply reflect that your portfolio is working as expected.

A conversation with a Co-operators financial representative can help put market performance in perspective and keep your strategy aligned with what matters most to you.