Fast-food restaurants have proven to be relatively resilient amid inflation. Even as costs and wages have gone up, popular chains have been able to raise prices and generate positive year-over-year growth. Some are even still growing at rates of 10% or more.

McDonald's (NYSE: MCD), Restaurant Brands (NYSE: QSR), and  (NASDAQ: SBUX) are all companies that are still generating strong results through the first half of the year. But that doesn't mean all of them are good buys right now. Let's review.

Comparable sales growth is a key metric for restaurants because it excludes stores that have closed and ones that have recently opened. It gives investors a more reliable growth rate since it only considers the restaurants that were also open at the same time last year; there's no artificial boost from simply opening up more locations.

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Source Fool.com