The company’s shares rose about 0.5% to touch a record high of US$1,858.88 (RM7,545.19) in early trading.

The world’s largest online retailer said it recorded the largest daily sales for Amazon’s Echo range of speakers, helped by heavy discounts. Fire TV Stick with Alexa Voice Remote and Echo Dot were the best-selling devices.

This year Prime Day, Amazon’s summer marketing event, started on July 16 and lasted 36 hours.

The technical glitches lasted for at least two hours and was likely exacerbated by excessive demand and traffic volume, RBC Capital Markets analyst Mark Mahaney said.

The retailer likely received between US$1.5 billion (RM6.1 billion) and US$2 billion (RM8.1 billion) in revenue from Prime Day and gross merchandise value topped US$3.5 billion (RM14.2 billion), Mahaney said.

Amazon said it sold over a million smart home devices in the United States.

The company did not provide total sales figures for the event, which was open only to members of its Prime subscription service across 17 countries, up from 13 last year.