Mortgage-backed securities III발음듣기
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Mortgage-backed securities III
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출처 : 칸아카데미
Mortgage-backed securities III
Welcome back to my series of presentations on mortgage-backed securities.
So let's review what we've already gone over.
So I've already drawn here - I actually prepared ahead of time--
so I've already drawn here kind of what we've already talked about.
So we start with borrowers who need to buy houses.
Each of them borrowed $1 million.
Actually let me write that down.
Let me change the color of my pen. Where'd my pen go?
OK. So each of these people borrowed $1 million.
OK. Each of them borrowed $1 million and there were 1,000 of them, right?
So $1 million times 1,000.
That's $1 billion that they needed.
And they said that they would pay 10% a year on that money that they borrowed.
So that's 10% for each of them is $100,000 and then as we said, there's 1,000 borrowers.
So they're going to put in $100 million, right?
100,000 times 1,000 is 100 million.
So just to simplify. Keep it in your mind. $1 billion goes to a bunch of borrowers, goes to 1,000 borrowers, to be specific.
And then each year, those borrowers are going to give the special purpose entity--
this is just a corporation designed to kind of structure these mortgage-backed securities--
they're going to give 10% of the billion, or $100 million back into this.
And then we said, OK, well where does that money for this special purpose entity, or for this corporation, come from?
Well it comes from the investors in the actual mortgage-backed securities.
And just to be clear, so the asset within this entity are the loans.
The loans are the main asset that's inside of the special purpose entity.
And the loans are just the right on these 10% payments.
And so money came from when the owners of each of these mortgage-backed securities - each, let's say, paid $1,000 for the mortgage-backed securities.
And in return, they're going to get 10% on their money.
So each security cost $1,000.
And then they're going to they're going to get $100 back per month.
And we said there are a million of these securities, so $1,000 times 1 million, that's where the $1 billion comes from.
My thing's been acting up.
That's where the $1 billion comes from.
And that essentially is lent to the borrowers.
And these guys will get 10%.
Now one thing I want you to keep in mind is, they get 10% only if every one of these borrowers pays their loans, never defaults, never pre-pays.
Pre-paying a mortgage is just saying, I sold the house.
I don't need the mortgage anymore, so I just pay it off.
So it's only 10%, indefinitely, if all of the borrowers pay all the money and never default or anything like that.
So this 10% is kind of in an ideal world.
Well everyone knows that it's not going to be exactly 10%.
Some percentage of these borrowers are going to default on their mortgage.
Some of them are going to pay ahead of time.
And actually that's what the buyer of the mortgage-backed security should try to figure out.
And all sorts of buyers are going to have all sorts of different assumptions.
And this is what you probably read some articles about, these hedge funds with these computer models to value their mortgage-backed securities.
And that's what those computer models do.
They try to look at historical data and figure out.
OK, for a given population pool in a given part of the country, what percentage of them are able to pay off their mortgage?
What percentage of them default on their mortgage?
And when they default, what is kind of the recovery?
Say they default on a $1 million mortgage, and then the special purpose entity would get control of that house.
And then if that house is sold for $500,000 because the property value went down, then the recovery would be 50%.
So that's all of the things that someone needs to factor in when they figure out what will be the real return.
10% is if everyone pays.
So let's make some very simple assumptions for ourselves.
Let's say we are thinking about investing in a mortgage-backed security and we want to gauge for ourselves what we think the return is going to be.
Well let's say we know that this pool of borrowers that - my pen keeps not working - that 20% will default.
We're not going to worry about pre-payment rates and all things like that.
Let's say 20% are going to default.
Of these 1,000 borrowers, 200 of them are just going to lose their job or whatever.
They can't afford a mortgage anymore.
And of those 20% that default, we have a 50% recovery.
So that means borrower X defaulted on his loan.
And then when we go and get the property - because the loan was secured by the property - when we auction off the property, we only get $500,000 for it.
So we get a 50% recovery.
50% of the original value of the loan.
So if 20% default and then there's a 50% recovery, then on average you're going to get 10% of the loan is worthless.
And I'm going to make some kind of hand waving assumptions here.
But you can assume statistically, and since this is a large number of borrowers - it's 1,000, right?
If there's only one borrower it would be hard to kind of gauge when he defaults, if he defaults at all.
We would just know that there is a 20% chance.
But when there's a large number of borrowers, you can kind of do the math and say, OK, on average 200 of these guys are going to default,
and instead of actually getting 10%, since 10% of the loans are going to be worthless, I'm going to get 10% less than this 10%.
So I'm going to get 9%.
So this is based on the model that we just constructed, right?
This is the model that we constructed.
This is a much simpler model than what most people use.
But based on the model that we just constructed, I think the real return we're going to get on this mortgage-backed security is 9%.
If there was another investor who assumed a 50% default rate,
but with a higher recovery, he or she would have a different kind of expected return from this security.
So why is this even useful?
Well think about it.
Before, in the case we did in the first video, when someone just borrows from the bank, the bank has very specific lending requirements.
They have their own model.
So there's a whole class of borrowers that they might have not been able to service.
Right? There might be people with really good credit scores, really good incomes, who don't have a down payment.
And if they don't meet what the bank's requirements are, they would never get a loan.
But there are probably some investors out there that would say, you know what?
For the right interest rate and for the right assumptions in my model, I'm willing to give anybody a loan, as long as I'm compensated for it enough.
And this is what this mortgage-backed security market allows.
It allows - let's say this group of borrowers - let's say this pool of borrowers right here actually didn't--
This pool of borrowers actually aren't the traditional--
they don't have 25% down and they don't have kind of the traditional requirements to get a normal mortgage--
but if I pool a bunch of people who don't have those traditional requirements, but they're good in other ways--
they have a high income or high credit score--
I can go through this alternate mechanism to find investors that are willing to loan them money.
So essentially, from the borrower's point of view, it allows more access to loan funding that they would have otherwise not been able to.
And from an investor point of view, it allows another place for me to invest in.
Maybe I feel that the computer models that I have are really good at predicting things like default rates, and recovery rates, and what a loan is worth.
And I feel that I can, in some ways, be a better loan officer than the banks.
And this would be an attractive place for me to invest in.
It also might just have a risk reward characteristic that doesn't exist in the market already, and it allows you to diversify into one other asset class.
So that's the value that it has across the entire spectrum.
Now in the next presentation I'm going to show how you can, I guess, further complicate this even more, so that you can open up the investment to even a larger group of investors.
Because you can think about it right now, there's probably some people who say, OK, I already said, some people will do these models and try to make their own assumptions and say, OK, this is going to give me 9% a year.
But there's a whole bunch of people who are going to say this is just too complicated for me.
This seems risky. I don't have any fancy models.
I only like to invest in things where I know I get my money.
Very highly rated debt is where I'm going to invest my money.
And there's another group of people who say, OK, 9%, that's nice and everything, but I'm a hotshot, I'm a gambler.
9% isn't the type of returns I want.
I want to take more risk and more return.
And so there should be something, maybe, for those people as well.
So that's what we're going to show you in the presentation on collateralized debt obligations. See you soon.
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So just to simplify. Keep it in your mind. $1 billion goes to a bunch of borrowers, goes to 1,000 borrowers, to be specific.발음듣기
대기중
And then we said, OK, well where does that money for this special purpose entity, or for this corporation, come from?발음듣기
대기중
And so money came from when the owners of each of these mortgage-backed securities - each, let's say, paid $1,000 for the mortgage-backed securities.발음듣기
대기중
And we said there are a million of these securities, so $1,000 times 1 million, that's where the $1 billion comes from.발음듣기
대기중
Now one thing I want you to keep in mind is, they get 10% only if every one of these borrowers pays their loans, never defaults, never pre-pays.발음듣기
대기중
So it's only 10%, indefinitely, if all of the borrowers pay all the money and never default or anything like that.발음듣기
대기중
And actually that's what the buyer of the mortgage-backed security should try to figure out.발음듣기
대기중
And this is what you probably read some articles about, these hedge funds with these computer models to value their mortgage-backed securities.발음듣기
대기중
OK, for a given population pool in a given part of the country, what percentage of them are able to pay off their mortgage?발음듣기
대기중
Say they default on a $1 million mortgage, and then the special purpose entity would get control of that house.발음듣기
대기중
And then if that house is sold for $500,000 because the property value went down, then the recovery would be 50%.발음듣기
대기중
So that's all of the things that someone needs to factor in when they figure out what will be the real return.발음듣기
대기중
Let's say we are thinking about investing in a mortgage-backed security and we want to gauge for ourselves what we think the return is going to be.발음듣기
대기중
Well let's say we know that this pool of borrowers that - my pen keeps not working - that 20% will default.발음듣기
대기중
And then when we go and get the property - because the loan was secured by the property - when we auction off the property, we only get $500,000 for it.발음듣기
대기중
So if 20% default and then there's a 50% recovery, then on average you're going to get 10% of the loan is worthless.발음듣기
대기중
But you can assume statistically, and since this is a large number of borrowers - it's 1,000, right?발음듣기
대기중
If there's only one borrower it would be hard to kind of gauge when he defaults, if he defaults at all.발음듣기
대기중
But when there's a large number of borrowers, you can kind of do the math and say, OK, on average 200 of these guys are going to default,발음듣기
대기중
and instead of actually getting 10%, since 10% of the loans are going to be worthless, I'm going to get 10% less than this 10%.발음듣기
대기중
But based on the model that we just constructed, I think the real return we're going to get on this mortgage-backed security is 9%.발음듣기
대기중
but with a higher recovery, he or she would have a different kind of expected return from this security.발음듣기
대기중
Before, in the case we did in the first video, when someone just borrows from the bank, the bank has very specific lending requirements.발음듣기
대기중
Right? There might be people with really good credit scores, really good incomes, who don't have a down payment.발음듣기
대기중
For the right interest rate and for the right assumptions in my model, I'm willing to give anybody a loan, as long as I'm compensated for it enough.발음듣기
대기중
It allows - let's say this group of borrowers - let's say this pool of borrowers right here actually didn't--발음듣기
대기중
they don't have 25% down and they don't have kind of the traditional requirements to get a normal mortgage--발음듣기
대기중
but if I pool a bunch of people who don't have those traditional requirements, but they're good in other ways--발음듣기
대기중
I can go through this alternate mechanism to find investors that are willing to loan them money.발음듣기
대기중
So essentially, from the borrower's point of view, it allows more access to loan funding that they would have otherwise not been able to.발음듣기
대기중
Maybe I feel that the computer models that I have are really good at predicting things like default rates, and recovery rates, and what a loan is worth.발음듣기
대기중
It also might just have a risk reward characteristic that doesn't exist in the market already, and it allows you to diversify into one other asset class.발음듣기
대기중
Now in the next presentation I'm going to show how you can, I guess, further complicate this even more, so that you can open up the investment to even a larger group of investors.발음듣기
대기중
Because you can think about it right now, there's probably some people who say, OK, I already said, some people will do these models and try to make their own assumptions and say, OK, this is going to give me 9% a year.발음듣기
대기중
But there's a whole bunch of people who are going to say this is just too complicated for me.발음듣기
대기중
And there's another group of people who say, OK, 9%, that's nice and everything, but I'm a hotshot, I'm a gambler.발음듣기
대기중
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