One, the yield to the worst call date is much better than yield to maturity of a non-callable bond (aka, bullet bond).

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The deciding investment metric is their yield-to-worst call as several of these preferreds trade above call prices.

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The immediate outlook for trading, capital-raising, merger deals and for the fees they yield to City firms is the worst it has arguably been for decades.

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Pay 107.50 and the yield to 2014 (which is the first and worst call) is 3.37%.

FORBES: Don't Hate All Bonds, Buy Yield To Call Paper