Global pandemic.

Supply-chain disruptions.

Increasingly costly cyber-attacks.

Extreme weather and other climate-related hazards.

And now, zombies.

Swiss Re’s chief economist this week said failures of hundreds of “zombie companies” over the next few years are among the concerns prompting insurers to reduce risk and charge higher premiums – a trend that is likely to continue as corporate failures increase.

Zombies – companies that lack the cash flow to cover the cost of their debt – are “a ticking time bomb” whose effects will be felt as governments and central banks withdraw measures that have helped keep these companies alive during the pandemic, Jerome Haegeli told Reuters.

The sobering prediction comes as stock prices hit records and the U.S. economy appears headed for 6.5 percent growth this year. Haegeli said these strengths are illusory because they’re based on temporary fiscal and monetary support.

Insurers are being cautious: reining in underwriting risk, being more prudent about investment allocations, and even taking precautions on insuring operations and supply-chain risk.

“They are not getting fooled by the short-term picture,” Haegeli said. “If you look at the market today, everything looks great. However, it’s illusionary to think that this environment can last” as “life support” is withdrawn in coming months. And that, he said, will bring an increase in long-overdue bankruptcies.

It’s tempting to presume that, as the pandemic-driven aspects of the economic crisis are brought under control, recovery will proceed apace. After all, the economy was doing fine before the pandemic hit, right?

But in September the Bank for International Settlements (BIS) pointed to a “pre-pandemic increase in the number of persistently unprofitable firms, so-called ‘zombies’, which are particularly vulnerable to economic downturns.”

Before the pandemic, the BIS said, about 20 percent of listed firms in the United States and United Kingdom were zombies and 30 percent in Australia and Canada. By comparison, zombies constituted about 15 percent of listed companies in 14 advanced economies in 2017 and 4 percent before the 2008 financial crisis.

Absent any reason to believe these companies’ situations substantially improved during the pandemic or that the contagion didn’t spawn more zombies, the expectation of more corporate collapses seems reasonable.

Add to this rising losses due to hurricanes, severe convective storms, and wildfires; the threat of sea level rise; and the growing reality business and government disruption from cybercrime, and the likelihood of increasing premiums and reduced coverage limits seems strong.