While managing the Fidelity Magellan mutual fund, investor Peter Lynch delivered annualized returns of about 29%. He looked for investment ideas in everyday life through a philosophy he called “buy what you know.”
Lynch believed that people often spot successful businesses through their daily routines before Wall Street analysts do.
Lynch famously said some of his best leads came from his wife, who would notice popular products during shopping trips and errands long before investors caught on.
For firefighters, those same insights can come from the job itself. Think about the equipment you rely on during calls. Over time, you notice which gear holds up under pressure, which vendors departments trust, and which technologies start appearing, whether on the scene or at industry conferences.
Those observations can offer a small informational edge. Firefighters see the tools and systems behind emergency services up close, often long before most investors even know the companies exist. The question is how to turn those observations into actual investment ideas.
Where Firefighters See Business in the Real World
Consider all the specialized equipment you interact with on every shift or training night. Radios, breathing apparatus, helmets, and turnout gear just scratch the surface of firefighter tools of the trade.
What many firefighters may not realize is that some of the companies behind this equipment are publicly traded businesses — meaning investors can buy shares and own a piece of the company.
Two well-known examples are Motorola Solutions and MSA Safety.
When you buy shares in a company, you participate in its financial success. If the company grows its earnings over time, the stock price may rise as well.
Many established companies also pay dividends, which are cash payments distributed to shareholders on a regular basis, often quarterly. Some companies also repurchase their own shares, known as buybacks, which reduces the total number of shares outstanding and increases each investor’s ownership percentage.
None of this means that simply recognizing a brand makes it a good investment. But your professional experience can provide useful context.
Again, firefighters know which gear holds up, which systems departments trust, and which vendors are widely adopted across the industry.
From there, the next move is stepping beyond the gear itself and looking at the business behind it. That means learning a few basic financial metrics that investors commonly use to evaluate whether a company is growing, profitable, and reasonably priced.
Basic Financial Metrics to Screen Stocks
You do not need to be a financial whiz to start evaluating stocks. In many cases, successful investing is less about finding the perfect company and more about avoiding the obviously bad ones.
The good news with companies like Motorola Solutions and MSA Safety is they are not speculative penny stocks. These are established companies with large customer bases, profitable operations, and products used across critical industries, such as public safety and industrial protection.
A good place to start is determining whether the company is profitable. One metric is profit margin, which measures how much of each dollar of revenue the company keeps after expenses and taxes.
For example, according to data on Yahoo Finance, MSA Safety reports a net profit margin of 14.88%, while Motorola Solutions reports 18.44%. Both numbers suggest healthy businesses.
Another useful figure is free cash flow, which represents how much money a company actually generates after covering its operating expenses and investments.
One version investors often look at is levered free cash flow, which accounts for the cost of paying interest on any debt the company carries.
Over the past 12 months, Motorola Solutions generated roughly $2 billion in levered free cash flow, while MSA Safety generated about $202 million. Investors want to see this number remain positive, because it indicates the company is bringing in more cash than it spends.
How to Value Stocks as a Beginner
At its core, investing is about estimating how much cash a company will generate in the future and deciding whether today’s price is reasonable.
Once profitability checks out, smart investors often look at valuation. One of the most widely used measures is the price to earnings (P/E) ratio.
The P/E ratio compares a company’s share price to its earnings per share. In simple terms, it shows how many dollars investors must pay to claim $1 of the company’s annual earnings. For example, if a company has a P/E ratio of 20, investors are paying $20 for every $1 the business earns each year.
This metric is easy to find on most financial websites. As of March 16, Motorola Solutions has a trailing P/E ratio of 37.11x, while MSA Safety trades closer to 25x.
On its own, however, the P/E ratio does not tell you much. It becomes more useful when compared with similar companies. Because both Motorola and MSA Safety fall within the industrial sector, one good peer benchmark is the Vanguard Industrials ETF.
Across the fund’s roughly 386 holdings, the average P/E ratio sits around 31.2x. Compared with that benchmark, MSA Safety appears somewhat less expensive than the sector average, while Motorola Solutions trades at a higher valuation relative to its peers.
No single metric can determine whether a stock is a good investment.
Investors often look at several indicators together to build a more complete picture.
But checking profitability, cash flow, and valuation provides a simple framework anyone can use to begin evaluating companies they already recognize from their daily work.
