Financial calculation for rate of return

[Kathryn Bangs]

How do I calculate my real rate of return if I buy a $43k deed of trust for $40k that pays interest of 8% and matures in 43 days?

I know calculation for annual rate of return but, my $ are invested shorter term and I’m not sure how to throw that in the mix to figure out what return really is.

Thanks for any insight.

[Chad U.]

There's not enough info given to determine an exact figure, like the payment amount, original balance or amortization.  However, I would expound upon what @Derek Kirkwood mentions above and just do a simple average annualized return - 7.5% x 365/43 = 63% annualized.