Why two similar companies trade at different multiples
Picking the right multiple is half the job. The other half is explaining why two companies in the same peer set, priced on the same multiple, don't land on the same number.
A multiple is the market's opinion of a business squeezed into one number. When two multiples differ, the opinions differ. Three things usually explain the gap.
Growth. A dollar of earnings that's growing is worth more than a dollar that's standing still. You're buying the whole future stream, priced today.
Margin. If more of every dollar of revenue survives to profit, each dollar of sales is worth more. Better engine, higher price per unit.
Risk. Say one business has three customers and another has thirty. Losing one means something very different in each case. The shakier the earnings, the less anyone pays for a dollar of them.
Leverage belongs in the answer too. Enterprise multiples are supposed to shrug at financing. A company drowning in debt trades at a discount anyway.
The day the market re-rated Amazon
In April 2015, Amazon reported Q1 earnings and broke out Amazon Web Services as its own segment for the first time. AWS had been running for nearly nine years with no reported numbers behind it. The working assumption on the street was that it lost money.
The filing said otherwise. AWS revenue was growing close to 50% year over year at an operating margin around 17%, and AWS on its own put up $265 million of operating income for the quarter. Amazon's headline number for the same quarter was a $57 million net loss, struck further down the income statement after interest and taxes.
The stock jumped 14% to an all-time high the next day, roughly $25 billion of market value in a single session. The business that morning was the same business as the night before. The market had simply seen the numbers. Amazon had been priced like a retailer. Once analysts could see the growth rate and the margin, they priced it like a technology company, and technology companies carry higher multiples.
Growth and margin, doing their work in one trading day.
Interview script
Other multiples exist because EV/EBITDA isn't always the right fit. Different businesses generate value differently. A bank's value comes from its balance sheet, so P/B makes sense. A SaaS company has sticky recurring revenue, so EV/ARR is appropriate. A manufacturer depends on capital reinvestment, so EV/EBIT captures what EBITDA misses. The key is matching the multiple to the business model. Using EV/EBITDA on a bank would be like measuring a fish's climbing ability.
And if they hand you two comparable companies and ask why one trades higher, walk growth, margin, and risk. Growing earnings are worth more than flat earnings. A fatter margin makes each dollar of sales worth more. Concentrated or volatile earnings get discounted, so a company with three customers prices worse than one with thirty. Then add leverage: enterprise multiples are supposed to ignore financing, but a balance sheet buried in debt drags the multiple down anyway.
