TJX board approves up to $1 bln buybackReutersSEATTLE, Sept 21 (Reuters) - US off-price retailer TJX Cos Inc (TJX.N) said on Monday that its board approved a buyback of up to $1 billion of its common stock. The amount represents about 6.2 percent of its outstanding common shares at current prices, ...TJX Expands Share-Buyback Program To $1B >TJXWall Street JournalTJX Unveils Splashy BuybackBarron's (blog)TJX Cos.