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Ralph Nader vs. Warren Buffett on share buybacks

Share buybacks are in focus again after Walmart announced its plan to buy back $20-billion-dollars of its own shares! Ralph Nader blasted stock buybacks as 'unimaginative' and 'greedy' corporate moves, but Warren Buffett said earlier this year that stock buybacks aren't the enemy! Yahoo Finance’s Alexis Christoforous, Rick Newman, and Seana Smith discuss.