Retailers like Target, Amazon and Walmart have found themselves at the center of grassroots calls on social media (now in the tens of thousands) to boycott spending on Feb. 28. Could Yellow's Bankruptcy Make Room for Amazon to Take Trucking Market Share?

A grassroots movement's "economic blackout" calls on consumers nationwide to avoid shopping at major retailers Friday in protest of corporate greed. Why it matters: The 24-hour boycott, organized by The People's Union USA,