Gone in 60 nanoseconds and other "knight-time" stories with David Greenberg!

­Is there any benefit that high-frequency trading brings to the market as a whole, or is it just a race to the bottom for the retail investor? We ask commodities trading veteran and former NYMEX board member David Greenberg. Where do regulators stand? Are they prepared to deal with high frequency trading? Plus it has been one year since S&P downgraded US credit to AA+. However, since then treasuries have rallied with yields reaching record lows. Sorry S&P, reality working against your call again. We talk about this, as well as alien banker life on Mars in today's Loose Change with Lauren and Demetri.

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