Qualys, Okta, Palo Alto Networks, Rapid7, and SentinelOne Shares Plummet, What You Need To Know

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What Happened?

A number of stocks fell in the afternoon session after elevated valuation multiples led investors and analysts to question whether the sector's sharp artificial intelligence-fueled gains can last. 

Cybersecurity shares had rallied strongly on expectations that the spread of artificial intelligence (AI) would drive demand for tools that protect companies' networks, data and cloud systems. That enthusiasm pushed prices up faster than the companies' underlying earnings and sales, according to the Financial Post. A valuation multiple compares a company's share price to a financial measure such as revenue or profit. The price-to-sales ratio is one example. When these multiples climb well above historical norms, investors are paying more for each dollar of a company's current business, betting that future growth will justify the premium. High multiples also leave less room for error. 

Any sign that growth may slow, or simply a shift in market mood, can trigger sharp pullbacks as investors lock in profits. That appears to be what is happening now. Rather than reacting to a specific piece of bad company news, the sector is moving lower as a group because investors are reassessing how much they are willing to pay for AI-linked growth. 

Because many cybersecurity firms trade on similar expectations, doubts about the sector's staying power tend to hit these stocks together. The long-term case for cybersecurity spending remains tied to AI adoption. In the near term, however, the retreat shows that stretched valuations can make even fast-growing sectors vulnerable to swings in investor sentiment.

The stock market overreacts to news, and big price drops can present good opportunities to buy high-quality stocks.

Among others, the following stocks were impacted:

Zooming In On Rapid7 (RPD)

Rapid7’s shares are extremely volatile and have had 51 moves greater than 5% over the last year. In that context, today’s move indicates the market considers this news meaningful but not something that would fundamentally change its perception of the business.

The previous big move we wrote about was 4 days ago when the stock gained 2.8% on the news that falling Treasury yields eased pressure on software stocks as signs of cooler U.S.–China tensions lifted risk appetite. The benchmark 10-year Treasury yield fell roughly 3 basis points to 4.97%, slipping below the 5% threshold, according to CNBC. A retreat in bond yields provides relief for enterprise software equities, whose valuations are anchored by cash flows projected years into the future. 

Separately, attention turned to the U.S.–China summit later in the week, slated to cover trade relations, artificial intelligence cooperation, and other geopolitical issues. The prospect of constructive talks on cross-border trade and technology policy helped ease that uncertainty and lifted risk appetite for software names.

Rapid7 is down 15.5% since the beginning of the year, and at $12.06 per share, it is trading 38% below its 52-week high of $19.43 from September 2025. Investors who bought $1,000 worth of Rapid7’s shares 5 years ago would now be looking at only $101.49.

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