It appears that people looking for the best bargains during the insane buying frenzy of Black Thursday, Cyber Monday and beyond would have done best at Chicago-based Groupon. This on-line purchasing powerhouse displayed the best deals and largest discounts than any other retailer during the 2015 Cyber Week shopping season.

Groupon prevailed with a 62-percent discount rate, according to a report published by Wallethub, a personal financial website. Researchers analyzed thousands of deals during the holidays from 30 of the largest US retailers and found that Groupon led the pack with Belk, Bon-Ton, JCPenney, Macy’s, eBay, Kohl’s, Sears, Amazon and Kmart following behind.

The category with the best discounts was jewelry. Computers, phones and video games were the least discounted articles. Sales on Cyber Monday reached $3.07 billion, 16 percent more than on the same day last year. Add that to the astounding sales from Thanksgiving on Thursday to Sunday, and the grand total is an astounding $11.1 billion.

The Wallethub study declared that the $3 billion total for Cyber Monday this year was the largest amount for a one-day sale in e-commerce history.