To get the same yield, an investor would have to buy a lower-rated bond, such as a 15-year double-A-rated bond or a triple-B-rated bond maturing in eight years.

WSJ: Are High-Yield Munis Headed for a Fall?

Many have been mesmerized by some of the high-yielding REITs that invest in mortgage-backed securities where the yields have been double or triple that of the 30-year Treasury bond.

FORBES: High-Yield Bets Bite Back

Once bad loans are accounted for, their yields average about 7%, more than double the yield on a 30-year Treasury bond.

WSJ: Six Investment Moves to Make Now

Click here for Forbes' bond guru Richard Lehmann's double-digit yielding buylist.

FORBES: The Moneyball Stock Indicator

Italian and Spanish bond prices slumped forcing benchmark yields up at a double-digit pace as speculators traded them in for the safer bet of German bunds.

FORBES: Eurozone Spreads Blow-Out as Focus Shifts From Athens To Lisbon

To Dr Baselt this suggested that tiny magnetic particles might be attached to molecules using either antibodies (which will bond to proteins, sugars and so on) or single-stranded DNA (which will bond to a complementary DNA strand to form the famous double helix).

ECONOMIST: Labs on a chip

Individual investors may not get as excited about e-bonds as they have about shares because, unlike some share prices, bond prices rarely double in 12 months.

ECONOMIST: E-bonds, licensed to kill

Carlson has delivered a 13% compound annual return since then, a percentage point better than the emerging market index and better than double what you would have earned from the collection of high-grade U.S. paper in the Vanguard Total Bond Market Index Fund .

FORBES: Bond Funds: Higher Yields, Higher Defaults