# Money Market Yield

The money market yield, also known as the CD-equivalent yield, allows the quoted yield on a T-bill to be compared with an interest-bearing money market instrument. Money market yield uses 360 day year for calculation.

In our T-bill example, we can calculate MMY as follows:

**MMY = (360*9.86%)/(360 – 90*9.86%) = 10.12%**

We can also calculate MMY from HPY as MMY is just the annualized HPY on a 360-day year basis.

HPR = 2.53%

Days to maturity = 60

**MMY = 2.53*360/90 = 10.11%**

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