Tempur-Pedic (TPX) rips higher in the post session as its Q4 easily beat Street expectations. Net earnings fell 58% Y/Y however, on weaker mattress sales and tighter margins. The company also posted mixed guidance for FY13, expecting to earn $2.55 on revenue of roughly $1.43B. Analysts are looking for $2.72 on $1.43 billion, respectively. The strong upside move likely has to do more with short covering. Recent market data has short interest pegged at 5.64M shares, or 9.3% of its float, which is a formidable position even for a multi-billion dollar company. Shares +17.7% AH.