Not sure if you still monitor the comments but what is the difference between the macaulay duration and the payback period we did in previous fm exams?

Although the idea is similar to the discounted payback period, the Macaulay duration takes into account all of the flows and gives an average. The discounted payback period ignores the flows after the payback period.

I really do not understand, why you are saying that the project is delivering half of its value in 2.2 years. In my understanding it delivers all money invested including required return in 2.2 years.

aditya13: You are allowed to take any calculator provided it does not display text at all.

However, given that it is your workings that are marked (rather than the final answer) it is much better to have a scientific calculator rather than a financial calculator.

Hello sir, All your lectures are very helpful and informative! I have a small doubt regarding the examination rules. Are we allowed to take an financial calculator in the exam as there are log and exponential calculations involved in few chapters?

When calculating the NPV we ignore the initial investment? Cause I’m seeing 307,162 But I assumed we working a regular NPV and I subtracted the 240000 and ended up with 10 years duration which I thought to be long …..

Dear John, Completely lost in this one. When I compare this to ACCA September/December 2016 Sample Answers, the question about Fernhurst, they calculate the project duration ar half of the value in 2.78 years by dividing the NPV of the project with multiplied proportions of the returns, eg (1×0.165)+(2×0.227)+(3×0.275)+(4×0.333) that gives the answer of 2.78 years. If I solve it using the technique in presentation I get 8.84 years, which seem unrealistic. Also there is no answer for Ex7 in course notes, and the course notes (pg. 53) state that the project duration “is a measure of the average time over which a project delivers it’s value”, other sources tell this is a measure of the time the project delivers half it’s value?

Which method is the correct one? Am I using the project duration where necessary or I should be using another technique?

Both techniques give the same result – I don’t know what went wrong in your calculation.

Think about it – multiply the PV’s by the years and then dividing the total by the NPV has to give the same as multiplying the PV/NPV but the years and then adding up.

Also, the two statements that you write in inverted commas are both saying the same thing 馃檪

mariochase24 says

Not sure if you still monitor the comments but what is the difference between the macaulay duration and the payback period we did in previous fm exams?

John Moffat says

Although the idea is similar to the discounted payback period, the Macaulay duration takes into account all of the flows and gives an average. The discounted payback period ignores the flows after the payback period.

mariochase24 says

Thank you

farhanahaque says

I love your videos thank you so much!!! God bless you

John Moffat says

Thank you for your comment 馃檪

confideans says

Macaulay Duration is the length of time taken by the investor to recover his invested money in the bond through coupons and principal repayment.

According to your explanation, it is an average time to get half the value.

Could you please clarify it? Thank you.

momanyi says

This is very helpful. I am mastering the techniques.

edite says

Hi,

I really do not understand, why you are saying that the project is delivering half of its value in 2.2 years. In my understanding it delivers all money invested including required return in 2.2 years.

Thank you!

Edite

John Moffat says

Its value is the benefit of the returns – not the initial investment.

Sarosh Awan says

Dear Sir, If the steps to working out Macaulay Duration and project duration are same what is the main difference between the two.

John Moffat says

One is used to consider bonds, and the other is used as a way of appraising investments in new projects.

John Moffat says

aditya13: You are allowed to take any calculator provided it does not display text at all.

However, given that it is your workings that are marked (rather than the final answer) it is much better to have a scientific calculator rather than a financial calculator.

aditya13 says

Hello sir, All your lectures are very helpful and informative!

I have a small doubt regarding the examination rules.

Are we allowed to take an financial calculator in the exam as there are log and exponential calculations involved in few chapters?

danique says

Hi John in eg 7….. The project duration

When calculating the NPV we ignore the initial investment? Cause I’m seeing 307,162

But I assumed we working a regular NPV and I subtracted the 240000 and ended up with 10 years duration which I thought to be long …..

John Moffat says

It is just as with the Macauley Duration. We divide by the PV of the future cash flows, not the NPV.

Ihmant says

Dear John,

Completely lost in this one. When I compare this to ACCA September/December 2016 Sample Answers, the question about Fernhurst, they calculate the project duration ar half of the value in 2.78 years by dividing the NPV of the project with multiplied proportions of the returns, eg (1×0.165)+(2×0.227)+(3×0.275)+(4×0.333) that gives the answer of 2.78 years. If I solve it using the technique in presentation I get 8.84 years, which seem unrealistic. Also there is no answer for Ex7 in course notes, and the course notes (pg. 53) state that the project duration “is a measure of the average time over which a project delivers it’s value”, other sources tell this is a measure of the time the project delivers half it’s value?

Which method is the correct one? Am I using the project duration where necessary or I should be using another technique?

John Moffat says

Both techniques give the same result – I don’t know what went wrong in your calculation.

Think about it – multiply the PV’s by the years and then dividing the total by the NPV has to give the same as multiplying the PV/NPV but the years and then adding up.

Also, the two statements that you write in inverted commas are both saying the same thing 馃檪

John Moffat says

As I say in the lecture, the arithmetic is the same – the Macaulay duration applies to bonds, the project duration applies to projects!

neka4real2004 says

Ok. Thank you

John Moffat says

You are welcome 馃檪

neka4real2004 says

So Please, what is the difference between the Macaulay duration and the Project Duration???