What happened Shares of airplane manufacturer Boeing (NYSE: BA) got a huge lift Tuesday when Bloomberg reported, late in the morning, that Amazon.com (NASDAQ: AMZN) is buying 11 Boeing 767-300 airplanes. As of 3:15 p.m. EST, Boeing stock is still up 4.7% on the news -- and that's kind of weird. Image source: Amazon.com. So what Why is it weird? Isn't it great news that Amazon is buying Boeings? Well, sort of yes, but also sort of no. You see, Amazon isn't buying new Boeing airplanes, and it isn't even buying them from Boeing. Rather, as Bloomberg notes, the planes Amazon is buying for its Prime Air delivery service are all "used Boeing 767-300 planes" -- seven of which are being purchased from Delta Air Lines (NYSE: DAL), with four more coming from WestJet Airlines. The former Delta jets are expected to join Prime Air in 2022, and the former WestJets will begin service this year, after first being converted from passenger airliners into an air freighter configuration. Now what If Amazon isn't buying jets directly from Boeing, though, why are investors taking this as good news for Boeing? Because the short answer is that it isn't good news -- or at least not immediately. Over time, Amazon will presumably hire Boeing to maintain and perhaps make upgrades on its new airplanes, generating service revenue for the airplane-building giant. But the longer-term picture is even more important to Boeing. Bloomberg notes that this is the first time Amazon has ever bought airplanes outright, as opposed to leasing them from other companies. And if this is a sign of where things are heading, then there's every possibility that in future years, Amazon will buy airplanes directly from Boeing. In that regard, after inducting the new planes into service, Amazon expects its Prime Air fleet to comprise about 85 planes by the end of 2022. The fleet is expected to more than double in size over time, moreover, to 200 aircraft. And if that's correct, then Boeing should have plenty of opportunities to sell brand-new aircraft to Amazon in the future. 10 stocks we like better than BoeingWhen investing geniuses David and Tom Gardner have a stock tip, it can pay to listen. After all, the newsletter they have run for over a decade, Motley Fool Stock Advisor, has tripled the market.* David and Tom just revealed what they believe are the ten best stocks for investors to buy right now... and Boeing wasn't one of them! That's right -- they think these 10 stocks are even better buys. See the 10 stocks *Stock Advisor returns as of November 20, 2020 John Mackey, CEO of Whole Foods Market, an Amazon subsidiary, is a member of The Motley Fool's board of directors. Rich Smith has no position in any of the stocks mentioned. The Motley Fool owns shares of and recommends Amazon. The Motley Fool recommends Delta Air Lines and recommends the following options: long January 2022 $1920 calls on Amazon and short January 2022 $1940 calls on Amazon. The Motley Fool has a disclosure policy.Source