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3 Mega-Cap Stocks with Warning Signs

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Megacap stocks dominate their sectors and their actions influence economies worldwide. The flip side though is that their sheer size means they have less room for explosive growth as scale works against them.

Sound complicated? With StockStory, it doesn’t have to be. Our job is to find you high-quality companies that can win regardless of the conditions. That said, here are three industry titans whose existing offerings may be tapped out and some other investments you should look into instead.

Home Depot (HD)

Market Cap: $355.1 billion

Founded and headquartered in Atlanta, Georgia, Home Depot (NYSE:HD) is a home improvement retailer that sells everything from tools to building materials to appliances.

Why Are We Wary of HD?

  1. Disappointing same-store sales over the past two years show customers aren’t responding well to its product selection and store experience
  2. Widely-available products (and therefore stiff competition) result in an inferior gross margin of 33.4% that must be offset through higher volumes
  3. Performance over the past three years shows its incremental sales were much less profitable, as its earnings per share fell by 3.3% annually

Home Depot’s stock price of $355.80 implies a valuation ratio of 23.9x forward P/E. Check out our free in-depth research report to learn more about why HD doesn’t pass our bar.

Thermo Fisher (TMO)

Market Cap: $211.3 billion

With over 14,000 sales personnel and a portfolio spanning more than 2,500 technology manufacturers, Thermo Fisher Scientific (NYSE:TMO) provides scientific equipment, reagents, consumables, software, and laboratory services to pharmaceutical, biotech, academic, and healthcare customers worldwide.

Why Are We Hesitant About TMO?

  1. Sales were flat over the last two years, indicating it’s failed to expand this cycle
  2. Organic sales performance over the past two years indicates the company may need to make strategic adjustments or rely on M&A to catalyze faster growth
  3. Efficiency has decreased over the last five years as its adjusted operating margin fell by 9.2 percentage points

At $558.70 per share, Thermo Fisher trades at 23.4x forward P/E. To fully understand why you should be careful with TMO, check out our full research report (it’s free for active Edge members).

Cisco (CSCO)

Market Cap: $300.3 billion

Founded in 1984 by a husband and wife team who wanted computers at Stanford to talk to computers at UC Berkeley, Cisco (NASDAQ:CSCO) designs and sells networking equipment, security solutions, and collaboration tools that help businesses connect their systems and secure their digital operations.

Why Does CSCO Fall Short?

  1. Flat sales over the last two years suggest it must find different ways to grow during this cycle
  2. Free cash flow margin dropped by 5.8 percentage points over the last five years, implying the company became more capital intensive as competition picked up
  3. Diminishing returns on capital suggest its earlier profit pools are drying up

Cisco is trading at $76.78 per share, or 18.1x forward P/E. Dive into our free research report to see why there are better opportunities than CSCO.

High-Quality Stocks for All Market Conditions

The market’s up big this year - but there’s a catch. Just 4 stocks account for half the S&P 500’s entire gain. That kind of concentration makes investors nervous, and for good reason. While everyone piles into the same crowded names, smart investors are hunting quality where no one’s looking - and paying a fraction of the price. Check out the high-quality names we’ve flagged in our Top 6 Stocks for this week. This is a curated list of our High Quality stocks that have generated a market-beating return of 244% over the last five years (as of June 30, 2025).

Stocks that made our list in 2020 include now familiar names such as Nvidia (+1,326% between June 2020 and June 2025) as well as under-the-radar businesses like the once-small-cap company Exlservice (+354% five-year return). Find your next big winner with StockStory today for free. Find your next big winner with StockStory today. Find your next big winner with StockStory today.

3 Mega-Cap Stocks with Warning Signs | MarketMinute