EQN 2150 Lecture Notes - Lecture 5: Discount Window, Purch Group

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Lec 5 business stuff initial purchase: get loan, mortgage. Make investment: huge upfront, hope to get returns in future (stream of income). But 1000 in future doesn"t have same value as 1000 today. Discount rate taken off of money in future to account for this. The further it is, the higher the discount. Discount rate: reflects development of the value of money over time. Represented by r in formulas: related to current and expected interest rates (represented by i, sometimes shown as r as well), r includes additional components: risk, income expectation. Questions: whats the annual cost of owning (not operating) a barn. Annuity payment formula: period of investment, discount rate, initial cost and spread evenly over all periods of investment. Pv= 100000, r=10%, n= 10yrs: p= (0. 10*100000)/1-(1+0. 10)^-10, p= 16273. Pv=(p*(1-(1+r)^-n))/r: pv= (10 000*(1. 1)^-10)/0. 1, pv= 61 445. Higher discount rate if uncertain of what happens in future.

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