According to the EPA, a motorist who drives the Volt exclusively on electric power will pay an estimated 4 cents per mile in energy costs, while one who never recharges the battery and runs the car exclusively on gasoline (with premium grade required) will pay 9 cents per mile.

FORBES: Living With A Chevrolet Volt

My analysis indicates, rather, that the risk premium on investment grade corporates is generous, making that group attractive by comparison.

FORBES: Is Emerging Markets Debt Cheap?

There's evidence that the risk premium is peaking for investment grade corporate debt.

FORBES: Market Strategy From The Waterboard

The expected credit risk premium over inflation from investment-grade securities is also expected to remain stable.

FORBES: Portfolio Solutions' 30-Year Market Forecast for Investment Planning (2013 edition)

It takes a double-size margin on premium gas, but the highest grade represents only 2% of its gasoline sales, versus 7% industrywide.

FORBES: Inconvenience

Big harvests in 2000 and 2001, bolstered by loads of new high-grade grapes such as Kuleto's, have increased the supply of premium wine and pushed out marginal, low-end producers.

FORBES: Fine whine

The risk premium in financial markets comes in as Treasury yields move up and fewer below-investment-grade debentures stop trading like yesterday's sardines.

FORBES: Uncle Sam: Not Too Big To Fail