Black Friday falls after Thanksgiving in America every year, and is traditionally a day when retailers offer massive discounts to unofficially start the Christmas shopping season.

Retail expenditure lifted 87% on Black Friday 2019.

Over the four-day sale period, electronic goods and department stores experienced the biggest online uplift.

By category, online spending in department stores and electronic goods retailing rose by 238% compared to the average November daily spend, while in store spending was up by 153%.

Online clothing sales rose by 146% and in-store clothing sales rose by 52%. Home furnishings and equipment spending was up by 116% online and 33% in-store. Not surprisingly, food and liquor posted smaller rises than the other categories both online and in-store.