Are Stocks Less Risky in the Long Run

First, let's take a look at key takeaways from the article

Key Takeaways:

- Stocks do not become less risky over time

- However, the volatility of your portfolio's CAGR stabilizes over time

- Also, the chance of ending up in loss comes down with time

Now that we've looked at the important takeaways, let's dive deep into the article

You have likely heard that while stocks are risky in the short term, they are often considered one of the best ways to build wealth over a longer investment horizon.

In our learning series—including the retirement modules—we frequently mention that your "wealth-building bucket" should be geared toward the long term and primarily invested in a well-diversified portfolio of stocks. Conversely, your shorter-term buckets should be allocated to safer, less volatile options like bond funds.

This raises an important question: Does holding stocks longer inherently make them less risky?

The short answer is no . Stocks do not magically become less risky over time. The underlying risk of a stock—measured by how much its return deviates from its average (its volatility)—remains the same regardless of how long you hold it.

However, while the asset's risk remains unchanged, the volatility of your portfolio's annualized return steadily decreases the longer you stay invested. To understand why this happens, let us look at history and then explore a few simulations.

A Historical Perspective

Consider the NIFTY 50, an index representing 50 of the largest publicly traded companies in India by market capitalization. A mutual fund tracking the NIFTY 50 serves as a great example of a well-diversified equity portfolio.

If you had invested ₹1 lakh in the NIFTY 50 at the beginning of 2000, it would have grown to approximately ₹18 lakh by the end of 2025. This translates to an impressive annualized return of about 12% over 26 years.

However, this growth was far from smooth. Returns varied wildly from year to year. During this 26-year stretch, there were five years of negative returns, including a steep 52% plunge in 2008. In fact, within just the first two years of investing, the portfolio would have declined by 27%. For our hypothetical investor, this would have felt like a nerve-racking roller coaster ride.

Yet, over time, the volatility of the portfolio's annualized returns smoothed out.

To truly understand why, we need to look beyond history. Historical data only shows us one actual sequence of returns—just one of infinitely many paths the market could have taken. To see how portfolio risk diminishes over time, we must use simulations to explore alternate realities.

The Simulation Study

What if the negative returns had occurred in different years? What if strong years were clustered together instead of spread out?

To test this, we simulated 100 possible 20-year return paths based on the historical characteristics of the NIFTY 50. Each of the 100 paths represents an alternate reality. The order of returns changes, and the magnitude of yearly gains and losses shifts, but the overall averages and volatility match the real-world NIFTY 50.

Assume an investor puts the same amount of money to work at the start of each simulated path. Because the sequence of returns differs, the portfolio grows differently in every single scenario, leaving us with 100 distinct wealth trajectories.

Here is where it gets interesting: regardless of the return path, the investor's final wealth begins to converge over time. In other words, no matter which sequence of market returns an investor experiences in real life, the long-term portfolio value tends to end up in a similar range—even though outcomes can differ dramatically in the short run. The chart below illustrates this phenomenon. Instead of displaying absolute wealth, it plots the Compound Annual Growth Rate (CAGR)—the annualized return—across 100 simulated return paths.

When we calculate the annualized portfolio returns after just one year, the results are scattered everywhere. Some paths capture outsized gains, while others suffer deep losses. The spread between the best and worst outcomes is enormous.

But as we extend the holding period, the chaos begins to settle. Extreme outcomes become less frequent, the range of portfolio CAGR narrows, and the volatility of annualized returns steadily declines over time. In the early years, several simulated return paths showed the portfolio ending in losses. However, by Year 10, the number of loss-making paths dropped sharply, and by Year 20, there were hardly any portfolios in the red.

Final Thoughts

Stocks are powerful wealth creators, but they only reward patient investors.

In the short run, equity investors must be prepared to endure stomach-churning volatility. However, if you commit to staying invested, time acts as a natural shock absorber. Your portfolio's volatility reduces, your returns stabilize, and your financial goals become much more predictable.