Published on September 19, 2023

In our view, the specific market dynamics that influence a company's sales growth prospects have a greater impact on equity returns than the overall direction of the economy.

As the saying goes, a rising tide lifts all boats – when the economy is strong, stocks tend to perform well. Nonetheless, in both good times and bad, there is dispersion among equity returns, affirming the (obvious) truth that the health of the economy is only one of multiple factors influencing stock performance.

In our view, the most important driver of equity returns, particularly for emerging companies, is the growth rate of demand for their products and services. We believe that the best opportunities for market outperformance occur when a company is operating in a sector or industry that is undergoing a transformation, creating a growing wave of new customers. In our portfolio, we seek to invest in a select group of innovative companies that are able to capitalize on untapped, expanding markets.

Cyclical vs. Secular Growth

Broadly speaking, growth falls into two categories – cyclical and secular. Cyclical growth can be thought of as passive, whereas secular growth is driven by a structural change in a sector or industry.

Cyclical Growth

Cyclical growth, as the name implies, is highly correlated with the economic cycle. Industries that are driven by cyclical growth tend to deliver positive returns during expanding economies and do poorly during a downturn.

Automobiles are a great example. As you can see from the chart below, total vehicle sales plummeted during the Great Recession in 2008 and began recovering along with the general economy shortly thereafter. Not surprisingly, they also fell sharply during the depths of the pandemic in 2020.

Source: Federal Reserve Bank of St. Louis

Secular Growth

Secular growth occurs when something fundamentally changes within a sector or industry, creating a wave of new demand. Secular growth rates can be materially higher than cyclical growth rates, as secular growth depends on changes in customer behavior rather than changes to GDP.

One of the great secular growth stories of the 21st century has been the rise in e-commerce. Online sales have been taking progressively more market share from traditional retailers for the past 20 years, a secular trend that has literally transformed how people shop. Even during the Great Recession, online shopping continued to expand, and interestingly, it substantially accelerated during the pandemic. Consumers were literally forced to stay home, which meant online shopping became a necessity. As society re-opened, in-person shopping regained some market share, but the long-term impact of e-commerce has been unmistakable. 

growth of ecommerce

Source: Federal Reserve Bank of St. Louis

It is important to note that some secular trends are not as resilient as e-commerce. In fact, according to Morgan Stanley, only about 30% of growth companies are likely to repeat their success in back-to-back bull markets.1 In other words, more than two-thirds of secular growth trends slow down materially following a bear market, as the underlying demand drivers often change.

Types of Secular Growth

Secular growth can take many forms, and trends can differ across industries, but at the highest level we feel there are three primary types: (1) foundational technology; (2) replacement product, existing market; (3) new product, new market. And of course, individual companies sometimes fit into multiple categories.

Foundational Technology

Some technological innovations are so impactful that they not only generate their own wave of demand, but they also create a foundation upon which other businesses can grow. Importantly, companies at the epicenter of a foundational secular trend do not necessarily perform better or become larger than the firms that they eventually spawn.

The advent of the internet is a great example. Plenty of companies profited from the development of the internet infrastructure, but over time the biggest winners have been firms that successfully leveraged the technology, including Amazon, Google, Facebook, and Netflix.

Smartphones are another example, as the iOS and Android operating systems created an interconnected network of portable devices for businesses to exploit. Obviously, handset manufacturers like Apple and Samsung benefitted from the smartphone revolution, but so did companies like Uber and Lyft (among many others).

And more recently, the rise of cloud computing has created a new foundation upon which many other businesses are emerging. It is among the most significant secular changes happening today, as software users around the world are beginning to appreciate the benefits of cloud deployments (faster implementation, automatic upgrades) versus the hassles of local installations. Software vendors like the shift also, as it allows them to move to a subscription business model, which creates smoother, more predictable revenue streams. Both cloud providers (e.g., Amazon Web Services and Microsoft Azure) as well as cloud-native software firms (e.g., and Adobe) have benefitted tremendously from this secular trend.

Replacement Product, Existing Market

Another major catalyst for secular growth occurs when an innovative startup builds a “better mousetrap,” taking market share from established incumbents. The key element to this type of growth is that the new company already knows that a viable market exists for its products/services. If they can truly deliver a superior solution, customers happily migrate, which results in outsized growth.

Amazon is an excellent example. As discussed above, online shopping has been taking market share from traditional retailers since it was introduced, and Amazon has been both the primary beneficiary as well as a major catalyst for the transition. The company has been able to expand continuously by capitalizing on consumer’s desire for convenience, and by creating a digital marketplace that obviated the need for in-person shopping. Features such as close-up photos, detailed product specifications, and crowdsourced reviews help Amazon customers feel comfortable purchasing items that they have never seen in person.

New Product, New Market

The third major type of secular growth occurs when an innovative startup develops a new product/service for a new market. In this case, the new offering must address a growing problem that has been previously unsolved, creating naturally strong demand.

Google fits into this category nicely. Prior to the advent of the internet, there was no need for search engines. But once the web was born, search became indispensable, as people needed a tool to navigate the ever-expanding landscape. Initially there were multiple competitors in the space, but over time Google established its dominance, currently controlling over 92% of all search traffic globally. The chart below shows the steady increase in Google searches from 2009-2019.

google growth

Source: Internet Live Stats

It is worth noting that Google also fits into the previous category (replacement product, existing market), as the site has effectively replaced traditional reference materials such as atlases, almanacs, and encyclopedias. But in our view, the specific category of secular growth is less important to the investment decision than the magnitude and staying power of the underlying trend(s).

Secular Growth in Practice

As emerging growth managers, we are constantly searching for companies that are well-positioned to take advantage of an untapped secular trend and deliver above market returns. The chart below provides a visual representation of our objective – to invest in companies just as they enter a period of sustained revenue acceleration.


target holding period

Below we have listed three companies from our portfolio that we feel have identified important secular growth trends and that we expect to deliver attractive returns over the near to medium term.

Onto Innovation (ONTO)

Onto Innovation, which manufactures semiconductor capital equipment, is a classic case of a company building new products for a new market. The company is well-positioned to capitalize on the long-term growth of artificial intelligence (among other technology trends), which we believe is an extremely important foundational technology. Though currently in a cyclical downturn, the wafer fab equipment (WFE) market has grown at 20% annually since 2019. Onto has expanded even faster, growing at 25% annually, by operating in favorable niches and expanding to grow market share at key customers.

The company’s big secular driver is the growth of data stored in the cloud, which AI algorithms use to train their models. Data storage is projected to grow 6x from 100 zettabytes today to 600 by 2030. We particularly like ONTO’s exposure to packaging inspection, a growing market due to new chiplet architectures which call for more intensive inspection. The company reported $1 billion in revenue in 2022 and recently raised its target to $2 billion in revenue in 5 years. Also, semiconductor capital equipment companies are increasingly viewed as long-term beneficiaries of AI due to the need for bigger and more complex chips.

Insulet (PODD)

Insulet is a medical device company that manufactures insulin pumps. Their core technology is a great example of a replacement product for an existing market. Insulin was invented over 100 years ago, and for most of that time diabetics have had to monitor their blood sugar levels manually and then inject themselves with the correct dosage whenever necessary. Insulet has fundamentally changed the process for patients, effectively automating all the steps through a disposable insulin pump that is attached to the skin and wirelessly connected to a smartphone. The pump is also connected to a continuous glucose monitor, so it knows when (and how much) to dispense, and all the activity is managed through the smartphone app.

Not surprisingly, it has become quite popular. Today, around 40% of type 1 diabetics are on insulin pumps and Insulet has 24% market share. Additionally, they are capturing roughly 50% of new pumpers (diabetics who are switching to pumps on an annual basis), suggesting their market share will increase substantially over time. In the most recent quarter their U.S. pump business grew over 40%. 

Axon (AXON)

Axon is a platform company with a strong presence in law enforcement and growing network effects. It is a business that does not fit neatly into a single secular growth category, as some of their products are replacements for equipment that already exists, while others are brand new. Regardless, widespread structural change in law enforcement has created robust demand for their technology. 

The company has a mission-oriented culture with a track record of innovation. Axon dominates the non-lethal weapon market with its Taser products and has built two additional franchises with body cameras and digital evidence management. These systems are increasingly tied together with increasing inter-operability and sharing of data. For example, Fleet 3 is an in-car video system that uses software and integrated automatic license plate recognition to save officers time and embed video into Axon’s digital evidence management solutions. Its most recent Taser 10 device increases the number of probes from 4 to 10, while almost doubling the range of prior weapons to 45 feet. The company has also successfully expanded its customer base from just municipalities to a broader set of federal, corrections, and private security, as well as international customers. Axon’s goal is to approximately double revenue from $1.2 billion in 2022 to $2 billion in 2025, while increasing EBITDA margins from 20% to 25%. 

Final Thoughts

In our view, identifying secular growth trends is the key to generating sustainable above market equity returns. We are constantly monitoring the market for new developments, and our focus on small cap companies allows us to invest in what we believe are the best ideas while they still offer the greatest upside potential. 


1 - Dennis Sherva, Morgan Stanley, “Investing in Emerging Growth Stocks,” April, 1987

This piece was originally published on June 5, 2019.

James Callinan, CFA

Chief Investment Officer – Emerging Growth


James Callinan, CFA

Chief Investment Officer – Emerging Growth

James Callinan, CFA

Chief Investment Officer – Emerging Growth

Jim Callinan was the Co-Founder & Chief Investment Officer at RS Investments. He also co-founded the RS Growth Group LLC in 1996 and managed the RS Emerging Growth Fund from 1996 until 2010. In 1999 Mr. Callinan was named Morningstar’s Domestic Stock Manager of the Year.*

He served as portfolio manager for the Putnam OTC Emerging Growth Fund from 1994 to 1996 and began his career at Putnam Investments as an equity research analyst in 1987. He joined Osterweis Capital Management in 2016 and brought with him the Emerging Growth Partners, LP, a concentrated small cap growth strategy he founded at RS in 2006.

Mr. Callinan is a member of the Weatherbie Capital Advisory Board.

He is an equity owner in the firm and the Lead Portfolio Manager for the emerging growth strategy.

Mr. Callinan graduated from Harvard College (B.A. in Economics), New York University (M.S. in Accounting) and Harvard Business School (M.B.A.). Mr. Callinan holds the CFA designation.

*Morningstar Managers of the Year are determined by a combination of qualitative research by Morningstar’s manager research analysts; risk-adjusted medium- to long-term performance track records; and performance in the calendar year.

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Emerging Opportunity Fund Quarter-End Performance (as of 3/31/24)

Fund 1 MO QTD YTD 1 YR 3 YR 5 YR 7 YR 10 YR INCEP
OSTGX 4.46% 12.10% 12.10% 26.31% -0.87% 13.72% 15.68% 12.93% 14.65%
Russell 2000 Growth Index 2.80 7.58 7.58 20.35 -2.68 7.38 8.40 7.89 10.29
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