When the stock market falls sharply, the stocks of many good companies are often sold off. That has happened in spades lately. The stock market, as measured by S&P 500is recently down about 21% from its 52-week high — while many stocks have seen their shares explode by 50%, 75%, and perhaps more.

Here are three companies you might want to invest in, now that their stocks are at lower levels than they’ve been in a while.

1. Nike

Nike (NKE 6.63%) is “the world’s leading designer, marketer and distributor of authentic footwear, apparel, equipment and accessories for a wide variety of sports and fitness activities.” That’s no surprise to most of us. You might be surprised to learn that the venerable Converse brand is now part of Nike, though.

Nike faces competition from companies like Adidas and New Balance, and is challenged by supply chain issues, like many other businesses. And sales in one key market, China, are being pressured by pandemic lockdowns. But Nike still has a very valuable brand — ranked 10th in the world with an estimated value of $41 billion, according to the people at Interbrand.

Investors dismissed Nike’s first-quarter report, which revealed inventory piling up. But the report wasn’t a total bust, with both revenue and earnings exceeding analyst expectations. Nike shares are down about 47% from their 52-week high, and with a recent price-to-earnings (P/E) ratio of 27, which is lower than the five-year average of 47, the stock is more attractively priced than months ago.

until, that’s not a bargain-basement price, so if you believe in Nike’s growth potential, you can buy it gradually over time, hoping for some lower entry points. Or you can just add it to your watch list, waiting for a more appealing time to “just do it” and buy.

2. Comcast

Comcast (CMCSA 3.81%) has grown into a massive media and technology company — primarily focused on connectivity, aggregation, and streaming and with a recent market value topping $135 billion. You may not realize it, but its businesses and brands include Xfinity, Comcast Business, Sky, Universal Filmed Entertainment Group, Universal Studio Group, Sky Studios, the NBC and Telemundo broadcast networks, several cable networks, Peacock, NBCUniversal News Group , NBC Sports , Sky News, and Sky Sports — not to mention Universal Parks and Resorts.

Comcast’s recently reported third quarter featured a 1.5% year-over-year decline in revenue. But free cash flow grew 4.7%, while adjusted net income rose 4.5% and net cash from operating activities rose 13.9%. The company has been investing in growing its Peacock streaming service, and its theme parks have been doing well.

Some worry about slowing growth in broadband and people continuing to cut cable in favor of streaming services, but others see an opportunity if Comcast divests some businesses and invests to faster growing ones, such as wireless and theme parks.

Comcast stock has recently fallen 42% from its 52-week high, pushing its forward P/E ratio down to 8.2 from its five-year average of 14.5. And as is always the case, when the stock price falls, the dividend yield rises — and Comcast stock recently yielded a solid 3.5%.

3. Alphabet

Alphabet (GOOG 2.72%) (GOOGL 2.63%) is a widely admired powerhouse, with a recent market value topping $1.1 trillion and a brand ranked No. 4 in the world (by Interbrand) and is worth about $252 billion. However, that hasn’t been enough to keep its stock afloat in these volatile days. Alphabet shares recently fell nearly 42% from their 52-week high, presenting an attractive entry point.

Remember that Alphabet is more than Google’s dominant search engine. Its universe includes the widely used Android mobile operating system, along with YouTube, and Google Cloud. YouTube alone is a very valuable asset, with users reportedly watching more than a billion hours of content every day and YouTube advertising recently delivering 10% of total revenue. Alphabet also owns the Google Play app store, smart thermostat maker Nest, and Fitbit, among other things. Google advertising still generates most of its revenue, though — fully 79% in its third quarter of 2022.

CEO Sundar Pichai recently said: “We’re honing our focus on a clear set of product and business priorities. The product announcements we’ve made in the past month alone have shown that very clearly, including significant improvements to both Search and Cloud, powered by AI, and new ways to monetize YouTube Shorts.” CFO Ruth Porat said, “We are working to realign resources to fuel our highest growth priorities.”

There are many other exciting growth stocks to consider for your long-term portfolio, and this is a good time to hunt for them, when they have fallen to more attractive levels.

Suzanne Frey, an executive at Alphabet, is a member of The Motley Fool’s board of directors. Selena Maranjian has positions in Alphabet (A shares) and Alphabet (C shares). The Motley Fool has positions and recommends Alphabet (A shares), Alphabet (C shares), and Nike. The Motley Fool recommends Comcast. The Motley Fool has a disclosure policy.