A sale isn't worth it anymore unless you're getting 40% off

• Many retailers are extending holiday shopping discounts to record levels and for longer periods.
• Research firm LSEG says anything less than a 40% discount is just standard now.
• To get the best discounts, you might have to head to your nearest mall.

Americans set online spending records with sales totaling $9.8 billion on Black Friday and $12.4 billion on Cyber Monday, but more discounts spread over a longer period can make it trickier for consumers to find the best deals.