 But as share prices have risen, so has the cost of pretty much everything else. Marketplace's Daniel Ackerman looked into that relationship. Even though inflation is down from its peak in 2022, it's left a lasting mark on prices, and not only at the grocery store. Inflation devalues everything, stocks as well as milk. Jim Angel is a finance professor at Georgetown, and he says there are a few ways that widespread inflation can raise stock prices specifically.