Amazon just enabled third parties to use its e-commerce delivery service for goods not sold through its platform.
This is another example of the company grinding more revenue out of its existing infrastructure, which should lead to more margin expansion.
Amazon (NASDAQ: AMZN) has done it again. The e-commerce giant keeps expanding the boundaries of its shipping business, and it just announced a new service that could further supercharge its growth: full third-party shipping assistance. Instead of only shipping items sold through its own e-commerce ecosystem, it will now allow other companies to use its delivery and supply chain network for their needs.
This could be a game-changer that brings fast shipping to all online retailers in the United States. Amazon's stock was rising on the news, and with shares at an all-time high, its market cap is now $2.9 trillion. Should you join the party and invest in Amazon today?
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The story of Amazon has been about building scale in e-commerce shipping, but only for items sold through its own marketplace, not elsewhere. The company is now launching Amazon Supply Chain Services, pitching its robust fulfillment network -- comprising more than 100 aircraft, 80,000 trailers, and 24,000 freight containers -- to retailers outside the Amazon ecosystem. This includes not only fast shipping to customers, but also the freight delivery of raw materials to a retailer's own manufacturing facilities.
There's an immense revenue opportunity here. For example, logistics giant United Parcel Service alone did $89 billion in revenue over the last 12 months. Amazon is not going to dethrone UPS tomorrow, but it could become a huge threat to it if it can deliver items for other retailers as quickly as it does for itself.
Amazon has invested tens of billions of dollars into its delivery infrastructure to enable rapid shipping. It's now deploying levers to steadily expand the revenue it can generate from this network, which should lead to higher profit margins. Its operating margin in the North American retail segment hit 7.3% over the last 12 months, a record high.
Image source: Getty Images.
Amazon's revenue is already immense, totaling $743 billion over the last 12 months. Its top line should see steady growth in the years ahead.
But the real story is its potential to expand its profit margins, and that goes beyond its logistics initiatives. Advertising revenue grew 22% year over year on a constant-currency basis last quarter. Cloud computing at Amazon Web Services (AWS) grew 28% year over year, and now has an operating margin of 35% on $137 billion in net sales.
Amazon's higher-margin segments are growing faster than its consolidated business, which should lead to expansion of consolidated operating margins. Operating margin was just 12% over the last 12 months; I believe the metric has plenty of room to keep expanding.

AMZN Operating Margin (TTM) data by YCharts.
With greater leverage across its delivery services and growth in advertising and AWS revenue, Amazon's operating margin could grow from 12% to close to 20% in the next few years. The company is especially well positioned to benefit from the artificial intelligence (AI) revolution; demand for computing power through AWS is rising at a torrid pace.
Total revenue should keep growing steadily; it would only need to grow at 10% annually over the next three years to reach $1 trillion (and net sales grew 17% last quarter). An 18% operating margin on $1 trillion in revenue would give it $180 billion in operating earnings. That would be twice as much as the $90 billion in trailing 12-month operating income it has today.
Right now, Amazon has a market cap of $2.9 trillion, and the stock trades at 16 times my forward earnings estimate. This is not overly cheap for a megacap stock. But as long as its profit margins keep expanding at a greater scale, I think investors will do just fine owning Amazon shares over the next five years.
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Brett Schafer has no position in any of the stocks mentioned. The Motley Fool has positions in and recommends Amazon and United Parcel Service. The Motley Fool has a disclosure policy.