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FIN 309
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Adjustable-Rate Mortgage (ARM)
A mortgage where the interest rate adjusts periodically based on changes in an observable index (in contract)
The lender liked this option because as the bank’s average deposit cost rose so did the interest rate the lender received on the ______ loans.
_____ helped in managing the bank’s Net Interest Margin
Net Interest Margin (NIM)
Interest Income (rate|lend) - Interest paid to Depositors (rate|borrow)
Index
Rate series used to determine the base interest rate on the loan
Margin
spread added to index in determining the mortgage interest rate (usually expressed in basis points).
Fully Indexed Rate (FIR)
index + margin
Initial Rate
The rate on the mortgage before the 1st Reset date. This rate is usually below the Fully Indexed Rate (often called Teaser Rate)
Initial Reset Date
The 1st date that the loan resets to the index + the margin.
Reset Frequency
How often the mortgage resets. Typical reset periods are: Annually, Monthly
Initial Rate Cap
The highest change in interest rate from the initial rate to the new rate on the 1st rate reset date.
Periodic Rate Cap
The highest change reset dates not including the first reset
Life Rate Cap
The maximum increase that the loan can reset to relative to the initial rate during the life of the loan.
1 Year CMT (Constant Maturity Treasury)
most common index in US.
It tracks the average yield on all US treasury securities that mature in 1 years time.
It provides a good indication of the 1 year cost of borrowing
Other Indexes
LIBOR
COFI, the Cost of Funds Index (like Libor for local regions).
Other CMT indices such as the 3yr CMT, 5yr CMT or 10yr CMT
A/B ARM
The first reset of the mortgage is A years from the origination date and it will reset every B years after that.
1/1 ARM
The first reset of the mortgage is 1 year from the origination date, and it will reset annually after that
3/1 ARM
The first reset of the mortgage is 3 years from the origination date, and it will reset annually after that.
3/3 ARM
The first reset of the mortgage is 3 years from the origination date, and it will reset every 3 years after that.
Fixed Rate
Hybrid ARM’s have a _____ for the first several years
ARM Mechanics
The standard ARM has a 30-year amortization.
After the initial period, most ARMs reset annually
When calculating monthly mortgage payments with an ARM you must recast the loan every time the loan rate changes
Recasting
The mortgage is re-amortized to reflect its current balance, new rate, and the same final maturity
result we find provides a new mortgage payment for each month during the next period
True APR for ARM
is the IRR for the borrower assuming the index rate stays the same for the term of the mortgage
Option AMR
Allows the borrower to reduce the initial loan payment below the fully amortizing level. The borrower can choose from a variety of payments specified in the contract.
The PMT of the borrower may be interest only or less (Negative Amortization).
What the borrower does not pay in interest during this period is added to the loan balance
*** These ARMs are often created with very low initial rates.
Rate Caps
they provide to the borrower protection when interest rates are rising rapidly
Caps
The _____ are typically expressed like X/Y/Z (e.g. 2/2/5)
Initial Cap
Refers to what happens at the 1st reset date. The mortgage rate cannot increase more than 2.00% above the initial interest rate.
Periodic Cap
On every subsequent reset date the rate cannot increase more than 2.00% above the last rate on the mortgage.
Life Cap
The highest mortgage rate can ever increase to is 5.00% above the initial mortgage rate.
Key Step in How to Determine the Mortgage Rate (When Caps are Included)
Index + Margin </= Last Mortgagerate + Periodic Cap
Mortgage Refinance (ReFi)
when a borrower replaces an existing mortgage with a new one, using the new borrowed loan to pay off existing balance.
______ typically requires the borrower pay new closing costs & fees.
FRMs with lower rates have lower balances before maturity.
Why would you refinance?
Borrowing Rate Declines
Credit Improvement
Cash Out (extract equity)
Choose to get out equity value of the property by increasing the principal amount borrowed
Costs of Refinancing
Bank Fees, Appraisals, Filing Fees, Points, Etc.
Prepayment penalties may exist.
Past points and fees paid are sunk costs. At the time a borrower is considering whether to refinance past costs are irrelevant, only current and future costs are relevant.
Benefits of Refinance
lower interest rate & higher loan amount (if cash out)
NAHB
Home buyers remain in their purchased home around 12 years
Locked in Real Estate Value
Even if home values do not change, homeowners accumulate over time wealth
Cashout ReFi
Refinance the mortgage and ”transform” the accumulated wealth into cash for other investments (e.g. medical bills, college expenses etc.)
Loan Officer (Mortgage Broker)
Sells the loan
Loan Underwriter
assesses the loan
Loan Servicer
collects payment from the borrower, remits to lender, taxes and insurance into escrow account etc. Collect late fees
Loan Underwriting
lender evaluates the eligibility of borrower to receive a loan.
The underwriter assesses the risk of loss from borrower, considering the loan application and the appraisal
The Underwriter needs to assess the borrowers future:
Ability to Pay
Willingness to Pay
The borrower’s ability (ATP) to pay changes
Results from a change in income of borrower
The borrower’s willingness to pay (WTP) depends on the house value over the mortgage balance .
If House Value < Mortgage balance the borrower cannot sell house for more than he owes
Credit
credit report
FICO score 300-850
A snapshot of risk that shows the credit history of the borrower.
Ranges from 300 –850 (for consumers).
Measures the borrowers’ WTP for their debt.
Measures likelihood of being 60 - 90 days late on a payment.
Main FICO Score providers: Experian, Transunion, Equifax.
Capacity
ability to make payments
Employment history, paystubs, bank statements etc.
PTI, TDR, (PITIM: Principal + Interest + Taxes + Insurance + Maintenance)
Reserve Requirement
Collateral
______ value in case of default (WTP)
Appraisal report
LTV requirement, if LTV>80% need Private Mortgage Insurance (PMI)
Underwriters use the three C’s to determine:
if you can be approved for a loan
Loan terms (rate, points, max LTV etc.)
Breakdown of Credit FICO Score
35% - Payment history
30% - Credit Utilization – credit usage/credit availability ratio
15% -Length of credit history
10% -Types of credit used
10% -Recent Credit searches
PTI (Payment to Income)
(Front-End DTI) The ratio of the borrowers’ monthly RE-related payments, including the mortgage payment, property taxes, mortgage insurance and property insurance, homeowner association fees (HOA), to their gross monthly income.
TDR (Total Debt Ratio)
(Back-End DTI) Ratio of total debt payments (mortgage payments, car loans, credit card loans, student loans etc.) to their gross monthly income
LTV (Collateral)
ratio of loan to value of the property.
Higher LTV corresponds to higher probability of negative equity & default.
Also, higher LTV leads to higher severity ratio for the lender
Documentation Quality [Underwriting Guidelines]
Full Documentation
Limited Documentation (Alt A)
No Documentation
Type of Residency [Underwriting Guidelines]
Primary Residence
Secondary home
Investment property
Type of Mortgage [Underwriting Guidelines]
Purchase
Refinance
Loan [Underwriting Guidelines]
Conforming
Jumbo
Who bear the risk of default of the borrower: Borrower, Lender, or Mortgage Insurer?
The Lender
Private Mortgage Insurance (PMI)
Premium between 30bps to 120bps of the mortgage’s principal amount
Government Insurance (FN or FH)
If a mortgage is guaranteed by Government Insurance, then lender is protected from principal’s loss
g-fee around 50 – 60 basis points (included in borrowing rate and goes to insurers to generate reserves for losses in the future)
Conventional (Conforming Mortgages)
FNMA/FHLMC insured (FN/FH)
Good FICO, low PTI, low LTV
Backed by Government Sponsored Enterprises (GSEs).
Regulated by Federal Housing Finance Authority (FHFA, est. 2008)
If certain underwriting criteria (industry standard) are met, then the lender can pay g-fee to GSE and transfer the risk of loss from lender to the GSE.
If the mortgage is pooled and sold to investors the guarantee gets transferred as well.
Provide (generally) the lowest cost of borrowing
Government Mortgages
FHA/VA insured (securitized by GNMA)
Riskier (lower FICO, higher PTI, higher LTV). Usually a smaller mortgage
Jumbo Mortgages (Non-Conforming)
Above conforming limit (usually good credit)
Subprime Mortgages
Risky. Low FICO (Lower than 620)
Evidence for Lax Screening
Check paper: “Did Securitization Lead to Lax Screening? Evidence from Subprime Loans”, published at QJE 2010
FICO <620 loans are more difficult to securitize than FICO> 620 loans
Not all 620 FICO loans have the same risk
Research Question: Careless screening for some 𝐹𝐼𝐶𝑂 > 620 loan borrowers?
Identification Strategy: FICO 621 is very similar risk to 619, however it is much more likely to get approved
Evidence: An easier to securitize portfolio of loans got defaulted 10%-25% more than a similar risk profile group. Evidence of lax screening