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1. Two-way price quotations.

Bid-offer spread.

2. Borrowing and investment.

The differential between the yields on two fixed-income securities, usually expressed in basis points.

In the corporate borrowing context, it is usually the difference between the yield on a fixed-income corporate security, and a comparable risk-free investment, such as a gilt.

3. Statistics.

In statistics, spread is the extent to which data are clustered centrally, or more widely dispersed.

Measured for example by Standard deviation, Variance or Mean deviation.

See also