When the Associated Press Twitter account was hacked and a fake tweet was sent out saying that President Obama was injured in a White House bombing, you may have wondered how one tweet could cause the entire stock market to react so hastily.This infographic from MarketWatch describes how traders take real-time cues from trusted sources (like the AP’s Twitter account) and make hair-trigger decisions based upon that information. It’s a fascinating and surreal look at how integrated social media has become with the stock markets. 

Stock market Twitter Infographic

Photo Bundesarchiv, B 145 Bild-F078969-0007 / CC-BY-SA [CC-BY-SA-3.0-de], via Wikimedia Commons