Twitter is changing the commodities market, reports Kate Kelly of CNBC in the first video clip below. Traders, investors and farmers are using the social media site to get real-time updates on pricing and planting — in 140 characters or less.

And it’s not just commodities trading that’s feeling the Twitter effect. Using sentiment as a predictor of the Dow, a hedge fund is analyzing the collective mood of tweets to get early insights into how the market will move. Watch the second video clip below for more.