Top Midday Stories: Amazon Seeking at Least $25 Billion From US Bond Sale; Fiserv Explores Sale of STAR Debit Network

All three major US stock indexes were down in late-morning trading Tuesday, with the Nasdaq Composite falling 1.4%, as chip stocks sold off and SpaceX (SPCX) debuted on the Nasdaq 100. In company news, Amazon (AMZN) is looking to raise at least $25 billion from a recently commenced US dollar bond sale, The offering size could rise depending on investor demand, the report said. The debt will be sold in as many as eight tranches, ranging from three to 40 years. Amazon shares were down 0.4% around midday. Fiserv (FISV) has held talks with JPMorgan Chase (JPM), Bank of America (BAC), Wells Fargo (WFC) and PNC Financial Services (PNC) about a potential sale of its STAR Network debit payments business, Fiserv shares were up 3.3%. Shares of JPMorgan, Bank of America, and PNC were up 0.2%, 0.4%, and 0.8%, respectively, while Wells Fargo was down 0.1%. Walmart (WMT) and Sam's Club lowered prices on "thousands" of essentials and groceries as part of a summer rollback effort, Walmart said late Monday. Walmart shares were.