When Prevalence Isn't Enough: The Viral Load of Markets

A recent study on Hendra virus has sent a stark warning to markets that are fixated on headline numbers. The research, published in Science Advances, found that tracking prevalence, how many bats test positive for the virus, is not an effective way to predict outbreaks. Instead, it's the viral load, or how much virus is present, that matters.

The study tracked 6,151 urine samples from bat roosts and discovered that low-load shedding of the virus was sustained year-round but never correlated with a single spillover event. Spillovers only occurred when both prevalence and load surged in tandem.

This finding has implications for markets beyond public health. The researchers noted that investors are making the same error by focusing on prevalence, or headline numbers, rather than viral load, or underlying trends. They cited three examples: Bitcoin, Palantir, and Supermicro AI servers.