Walmart dreams of one day free shipping – Amazon.com, Inc. (NASDAQ: AMZN)

Walmart (NYSE: WMT) fires the last block of the all-out supply war in retail.

"One-day free shipping … without a membership fee. Now it would be groundbreaking., tweeted retail giant yesterday after the market close.

Walmart dream follows the Amazon (NASDAQ: AMZN) disclosure during the earnings call that it plans to roll out a day's Prime freight this year through what is expected to be a heavy investment in the company's internal delivery infrastructure.

Amazon's announcement of Target shares (NYSE: TGT) dropped 5.7% on Friday And Walmart 1[ads1].9% lower, also in the mix was FedEX (NYSE: FDX) of 2.6% and UPS (NYSE: UPS) shed 1.1% as investors measured the potential impact on the freight rates.

Amazon and Walmart's willingness to invest heavily in a day's shipping can also increase the pressure on other retailers such as Macy's (NYSE: M), Nordstrom (NYSE: JWN), Best Buy (NYSE: BBY), Office Depot (NASDAQ) : ODP) and Dick's Sports Goods (NYSE: DKS) continue.

Formerly: Amazon's core Prime gets a d ags freight – earning calls (25. April)

Formerly: Retail sector rattled by Amazon shipping move (April 26)