sweetener(redirected from bell and whistle)
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An addition to a security that makes it more appealing to investors. One popular sweetener is the addition of warrants (options to buy stock) to a bond in order to make the bond marketable with a lower interest cost.
Something extra included in a transaction to make it more palatable to the other side. For example,Farmer Brown might agree to mow the fields for 5 years if Roberta Rider agrees to buy 10 acres of his land for a horse farm.