Malz min. Spread - vs - Implied Implied

jalbalicious

New Member
Hi there,

I was playing around with the formulas for Malz's minimum spread and the implied yield:

Malz min sread:
(1-PD)*(1+r+z) + PD(RR) = 1+r
Implied yield:
y =[ (1+r)/{(1-PD) + PD(RR) } ] -1

As they essentially use the same inputs I thought perhaps it was possible to arrive at one formula from the other by swapping r+z (risk free + spread) with y (yield) for each. However on doing so i was not able to arrive to derive one from the other.

I'm thinking it is either:
1) my maths ability failing me or,
2) r+z <> y

I'm confident my issue could be either or both of the above points - but am wondering if anyone has more information or can shed some light on this. ?


Cheers
 
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