Hello!
Please, help me to understand the mathematical logic behind the money market yield.
Here is the equation:
money market yield = [360 x r BD] / [360 - (t x rBD)]
where rBD is the band discount rate; t - days till maturity.
For example:
rMM = (360)(0.05)/[360 − (120)(0.05)] = 0.0508
Here is how I started interpreting the math (but stumbled):
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in the numerator we have 360 x bank discount rate = 360 x 0.05 = 18; this seems to give the number of periods within a year, during which 0.05 could be earned; is that so?
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(120)(0.05) = 16 this also gives the number of periods, but what these periods mean?
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[360 − (120)(0.05)] = 360 - 16 = 354 what happens here?
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finally 18 / 354 = 0.0508 I guess I will be able to understand what happens here if I understand three previous ones.
Thank you very much!