3 High-Flying Stocks We Find Risky

Expensive stocks typically earn their valuations through superior growth rates that other companies simply can’t match. The flip side though is that these lofty expectations make them particularly susceptible to drawdowns when market sentiment shifts.

Determining whether a company’s quality justifies its price causes headaches for nearly all investors, which is why we started StockStory - to help you separate the real opportunities from the speculative ones. Keeping that in mind, here are three high-flying stocks climbing an uphill battle and some alternatives you should consider instead.

Monro (MNRO)

Forward P/E Ratio: 31.2x

Started as a single location in Rochester, New York, Monro (NASDAQ:MNRO) provides common auto services such as brake repairs, tire replacements, and oil changes.

Why Do We Pass on MNRO?

1. Store closures and disappointing same-store sales suggest demand is sluggish and it’s rightsizing its operations
2. Disappointing same-store sales over the past two years show customers aren’t responding well to its product selection and store experience
3. Earnings per share decreased by more than its revenue over the last three years, showing each sale was less profitable

Monro’s stock price of $19.07 implies a valuation ratio of 31.2x forward P/E. Read our free research report to see why you should think twice about including MNRO in your portfolio.

Perma-Fix (PESI)

Forward P/E Ratio: 518.7x

Tackling hazardous waste challenges since 1990, Perma-Fix (NASDAQ:PESI) provides environmental waste treatment services.

Why Do We Avoid PESI?

1. Sales tumbled by 9.4% annually over the last five years, showing market trends are working against its favor during this cycle
2. Diminishing returns on capital from an already low starting point show that neither management’s prior nor current bets are going as planned
3. Short cash runway increases the probability of a capital raise that dilutes existing shareholders

At $15.41 per share, Perma-Fix trades at 518.7x forward P/E. To fully understand why you should be careful with PESI, check out our full research report (it’s free).

Mobileye (MBLY)

Forward P/E Ratio: 36.9x

With its EyeQ chips installed in over 200 million vehicles worldwide, Mobileye (NASDAQ:MBLY) develops advanced driver assistance systems and autonomous driving technologies that help vehicles detect and respond to road conditions.

Why Do We Steer Clear of MBLY?

1. Annual sales declines of 4.6% for the past two years show its products and services struggled to connect with the market during this cycle
2. Free cash flow margin dropped by 5.2 percentage points over the last five years, implying the company became more capital intensive as competition picked up
3. Waning returns on capital from an already weak starting point displays the inefficacy of management’s past and current investment decisions

Mobileye is trading at $9.25 per share, or 36.9x forward P/E. If you’re considering MBLY for your portfolio, see our FREE research report to learn more.

Stocks We Like More

If your portfolio success hinges on just 4 stocks, your wealth is built on fragile ground. You have a small window to secure high-quality assets before the market widens and these prices disappear.

Don’t wait for the next volatility shock. Check out 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.