Stryker, the medical device giant, saw its market cap evaporate by nearly $6 billion on Wednesday after an Iranian-linked hacker group called Handala shut down the company's global operations. The stock dropped 4.4% in the first three hours of trading, and it's still falling as investors wake up to a risk nobody was pricing in: healthcare tech companies are sitting ducks in this war.

Let's be clear about what happened. This wasn't a minor IT glitch. Handala, a cyber group with ties to Iran, launched a coordinated attack that completely halted Stryker's operations globally for more than six hours. That means hospitals couldn't order devices. Sales teams couldn't process orders. Supply chains froze. And investors panicked.

The stock opened at around $137 billion in market cap and shed $6 billion by mid-morning. That's real money, and it's gone because of a vulnerability that almost nobody in healthcare tech was taking seriously. Until now.

Here's the part that should worry anyone holding healthcare stocks: Stryker is not unique. The entire sector runs on interconnected systems, cloud infrastructure, and just-in-time supply chains. If you can take down one company's operations for six hours, you can probably do it to others. And if you're Iran looking to inflict economic damage without firing a missile, targeting high-value healthcare companies is a pretty efficient strategy.

So which stocks are most exposed? Look for companies with heavy reliance on cloud-based systems, global operations in vulnerable regions, and thin IT security budgets. Think medical device manufacturers, healthcare software providers, and pharma companies with digital supply chains. Abbott Laboratories, Medtronic, Boston Scientific, and Philips all fit the profile. They're not necessarily next, but they're in the same risk category.

The smart money is already asking questions. How much are these companies spending on cybersecurity? Do they have redundant systems? What's their incident response time? And most importantly: are they insured for this kind of attack? Because if cyberattacks on healthcare infrastructure become a pattern and they might insurance costs are about to skyrocket.