Spread
From ACT Wiki
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.
Usually, it is 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.
