MINYANVILLE ORIGINAL The 2012 buyback blitz continues.  In October dozens of companies announced or extended buyback plans including IBM (NYSE:IBM) which said on October 30 it would increase its stock repurchase fund by 75% to 11.7 billion. The company has spent $3 billion on share repurchases so far this year. The increase represents an additional $5 billion in stock or about 2% of the company's market value. Joining IBM at the billion-dollar level is TRW Auto (NYSE:TRW) which pledged to spend $1 billion to buy back stock (18% market value) over the next two years. In July we wrote about the earlier group of companies ...