As someone else mentioned, the stores in the mall have great after-Christmas day sales. Although inventory is a reason why they mark down their items, I also think it has to do with returns. Most of the time if someone returns without a receipt they get the lowest sale price for it. Well if someone originally got something for $20 before Christmas but they lost the receipt, when they come to return it after Christmas it's marked down to $10. The store makes a $10 profit still, regardless.
Also I don't know when it's supposed to start, but the Victoria's Secret Semi-annual sale is supposed to start soon, anyone know when?