Tell me that this is not monopoly power being abused:

Amazon.com Inc. is blocking its third-party sellers from using FedEx Corp.’s ground delivery network for Prime shipments, citing a decline in performance heading into the final stretch of the holiday shopping season.

The ban on using FedEx’s Ground and Home services starts this week and will last “until the delivery performance of these ship methods improves,” according to an email Amazon sent Sunday to merchants that was reviewed by The Wall Street Journal.

Amazon has stopped using FedEx for its own deliveries in the U.S., but third-party merchants had still been able to use FedEx. Such sellers now account for more than half of the merchandise sold on Amazon’s website, including many items listed as eligible for Prime.

FedEx said the decision impacts a small number of shippers but “limits the options for those small businesses on some of the highest shipping days in history.” The carrier said it still expects to handle a record number of packages this holiday season. “The overall impact to our business is minuscule,” a FedEx spokeswoman said.

An Amazon spokesman said the policy change is to ensure customers receive their packages on time and the e-commerce company is managing delivery cutoffs so that orders arrive by Christmas. He said the ban is temporary and will be lifted once FedEx service levels improve.

In its email to merchants, Amazon said sellers can use FedEx’s speedier and more expensive Express service for Prime orders or FedEx Ground for non-Prime shipments.

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Earlier this year, Amazon and FedEx ended two major shipping contracts, totaling some $900 million in revenue for FedEx. The overnight-delivery pioneer is shifting its focus to retailers such as Walmart Inc. and Target Corp. that compete with Amazon.

If you believe that this was not an anti-competitive effort coming from Amazon, I have a helipad in Brooklyn that I want to sell you.