A roundup of the week's business and financial news, with CNBC's Bill Griffeth.   A look ahead to the next week's business and financial news, with CNBC's Bill Griffeth.   The presidential hopefuls are fine-tuning their pitches in the run-up to the crucial Iowa caucuses, and Greg Valliere, of the Stanford Financial Group, and Andrew Busch, of BMO Capital Markets, share their insight.   Banks are battling for capital, Citi may be cutting jobs and Bank of America has no more soup in its cafeteria, reports CNBC's Charlie Gasparino.