What Are Defensive Stocks and How Do They Differ from Regular Stocks?

Simply put, defensive stocks are shares of companies that provide products or services people need no matter whether the economy is booming or in recession^[1]. For example, the food you eat every day, the hospitals you go to when sick, and the water and electricity you use at home—these needs don't disappear when the economy is bad, so these companies' revenue and profits are relatively stable, and their stock prices are more resilient.

Imagine if the economy takes a downturn: you might postpone buying a new car or upgrading your phone, but you won't stop eating, seeing a doctor, or using electricity. This is 'demand rigidity'—no matter the environment, these are essential needs. Therefore, companies that produce these necessities see little fluctuation in sales and profits, and investors are willing to hold them during uncertain times, like taking shelter in a sturdy fortress during a storm.

In the GICS (Global Industry Classification Standard), the three classic defensive sectors are: consumer staples (food & beverages, household & personal care), healthcare, and utilities^[2]. The consumer staples sector specifically includes producers and distributors of food, beverages, tobacco, as well as non-durable household goods, personal care products, and food & drug retailers^[3].

To understand how these sectors fit into the 11 GICS sectors, check out How the 11 GICS Sectors Are Divided.

Why Do Defensive Stocks Hold Up in a Bear Market?

The core reason is 'demand rigidity'—no matter how bad the economy gets, people still eat, get treated, and use electricity. This stability makes investors want to park their money in these 'safe havens' during panic, and the inflow of funds also supports the stock price.

Looking at the data, during the 2008 financial crisis, the S&P 500 fell about 57% from peak to trough, while the consumer staples sector fell only about 18% during the same period—less than a third of the market's decline^[7]. In the 2022 bear market, the S&P 500 fell about 24% for the year, while consumer staples fell only 0.6%, and utilities even rose 1.6%^[8].

Additionally, utility companies are often regulated monopolies; price increases require hearings and approvals, and regulators set a 'reasonable rate of return,' making their earnings and dividends more predictable^[6]. This institutional protection also enhances their resilience.

For example, an electric company is the sole power supplier in its area. The government allows it to earn a reasonable profit, but rate increases must go through public hearings. This model makes its income as stable as a salary, so investors are naturally willing to hold it during economic turbulence.

Going deeper, why is demand rigidity so important? Because stock prices ultimately reflect the discounted value of a company's future cash flows. When the economy enters a recession, the expected future cash flows of cyclical companies drop sharply, causing their stock prices to plummet. In contrast, the cash flow expectations for defensive companies remain almost unchanged, so their stock prices fall much less. It's like two ships: one loaded with fragile porcelain, the other with sandbags. When a storm hits, the sandbag ship may rock, but it won't suffer heavy losses.

Moreover, in a bear market, investor sentiment turns fearful, prompting them to sell high-risk stocks and buy low-risk defensive stocks. This 'flight to safety' inflow also supports defensive stock prices. So defensive stocks not only fall less in bear markets, but sometimes even rise against the trend, as utilities did in 2022.

Are Defensive Stocks Guaranteed Not to Lose Money?

Don't think that way. Defensive stocks are only relatively resilient, not absolutely immune to declines. For instance, when the pandemic hit in March 2020, the utilities sector also fell about 20% at one point^[13]. In a deep bear market, everything falls, and defensive stocks will also decline, just usually less than the broader market and with a faster recovery.

So 'defensive' is a relative concept, meaning they fall less and are steadier, not that they guarantee principal. If you put all your money into defensive stocks thinking you're safe, the risk is actually high.

It's like wearing a bulletproof vest—it reduces harm, but a bullet to a vital spot can still hurt. Defensive stocks are similar: they cushion market shocks but cannot completely avoid losses. In short, investing in defensive stocks is not 'sure win'; it only reduces portfolio volatility, not eliminates risk. So treat defensive stocks as part of your portfolio, not your entire net worth.

Additionally, defensive stocks have their own risks, such as regulatory changes, intensifying industry competition, or management missteps, which can cause a particular defensive stock to underperform. Therefore, even when buying defensive stocks, diversify rather than betting on a single company.

What Beta Coefficient Qualifies as a Defensive Stock?

Beta is a measure of a stock's volatility relative to the market: Beta=1 means it moves in line with the market, less than 1 means less volatility, and greater than 1 means more volatility^[4]. Defensive stocks typically have betas below 0.5, or even negative (moving opposite to the market)^[5].

But Beta is just a reference, not the only criterion. Some utility stocks might have a beta of only 0.3, while certain healthcare stocks could be close to 1. When judging, you should also consider the industry, earnings stability, dividends, and other factors.

For example, a utility company with a beta of 0.3 means that for every 1% move in the market, it moves on average only 0.3%. It's like a small boat that rocks gently in big waves, while a tech stock with a beta of 1.5 is like a speedboat that lurches violently.

A negative beta means the stock moves opposite to the market, which is rare and typically seen in gold or certain defensive assets. For instance, when the market falls, gold stocks might rise because investors seek safety. But a negative beta isn't always good, because if the market rises, such stocks might fall. So they are better suited as hedging tools rather than core holdings.

So, how do you calculate Beta? Simply put, Beta is the covariance of the stock's returns with the market's returns divided by the variance of the market's returns. But ordinary investors don't need to calculate it themselves; many financial websites provide beta values for individual stocks. You can check before buying—if the beta is clearly below 1, it may have defensive characteristics.

Are Dividend Aristocrats the Same as Defensive Stocks?

Not exactly, but they overlap significantly. Dividend Aristocrats is an index officially defined by S&P Dow Jones Indices, requiring constituents to be S&P 500 members and to have increased dividends for at least 25 consecutive years^[11].

Many defensive stocks (especially consumer staples and utilities) do meet this criterion, but Dividend Aristocrats may also include some cyclical companies, so you can't equate the two.

For example, an industrial company might have raised dividends for 25 years, but it's in a cyclical industry, so earnings could drop sharply in a downturn. Therefore, Dividend Aristocrats emphasize dividend stability, while defensive stocks emphasize earnings stability. They overlap but are not identical.

Think of it this way: Dividend Aristocrats are like employees who get a raise every year, but some might be from sales (cyclical) with volatile performance. Defensive stocks are like back-office staff who may not get raises as often but have stable jobs. So if you want stocks that are 'stable and pay dividends,' Dividend Aristocrats is a good screening tool, but you should also consider the industry.

Also, the Dividend Aristocrats index has strict criteria, including market cap and liquidity, so not every company with 25 years of dividend increases is included. If you're interested in this index, you can check the official methodology from S&P Dow Jones Indices, but for the average investor, buying a Dividend Aristocrats ETF might be simpler.

Will Defensive Stocks Underperform the Market in a Bull Market?

Most likely, yes. Defensive stocks are characterized by 'stability,' but the trade-off is 'slow growth.' During strong economic expansion or bull markets, capital tends to favor growth and cyclical stocks, and defensive sectors typically lag significantly^[12].

For example, in the 2020-2021 bull market, tech stocks doubled, while utility stocks might have only risen 20%. Holding defensive sectors heavily for the long term means missing many opportunities—that's the 'opportunity cost.' So defensive stocks are better as part of a portfolio, not the whole thing.

If you want to know the difference between growth and value stocks, refer to Growth vs. Value Stocks.

Why do defensive stocks lag in bull markets? Because in bull markets, investors have a higher risk appetite and chase high-growth stocks like tech and industrials, which have faster earnings growth and greater price elasticity. Defensive stocks have steady but unexciting earnings growth, so capital flows to where returns are higher. It's like at a party, people prefer the lively dancers over the quiet observers.

But underperforming doesn't mean losing money; it just means earning less. If you buy defensive stocks at the start of a bull market, you might only get single-digit returns while the market gains over 20%. So if you seek high returns, you should allocate more to growth stocks in a bull market; if you value stability, defensive stocks are still a good choice. The key is balance.

How Can Ordinary Investors Use ETFs to Buy Defensive Sectors in One Click?

The simplest way is to buy sector ETFs, such as those tracking consumer staples, healthcare, or utilities. No need to pick individual stocks—one click diversifies risk.

Alternatively, consider Dividend Aristocrat ETFs, which automatically screen for companies with 25 years of dividend increases, highly overlapping with defensive stocks, saving time and effort.

Before buying an ETF, check the expense ratio, tracking error, and dividend rules. For details, see How U.S. Stock ETFs Distribute Dividends.

In practice, you can search for 'Consumer Staples ETF' or 'Utilities ETF' in your brokerage app and choose one with a large size and low fees. For example, some ETFs track the S&P 500 Consumer Staples Index, others track utility indices. After buying, you effectively hold a basket of defensive stocks, spreading out individual stock risk.

Also, Dividend Aristocrat ETFs are an option. They screen for companies with 25 years of dividend increases, which typically have stable earnings and generous dividends, highly overlapping with defensive stocks. But note that these ETFs may include some cyclical companies, so if you want pure defensive sectors, sector ETFs are more direct.

Finally, don't forget to rebalance periodically. For instance, set a target allocation, like 30% defensive and 70% growth, then adjust once a year to keep your portfolio at your desired risk level. This way, you can enjoy bull market gains while having some protection in bear markets.