Definition of Modified pass-throughs

Modified pass-throughs

Agency pass-throughs that guarantee (1) timely interest payments and (2) principal
payments as collected, but no later than a specified time after they are due. Related: fully modified passthroughs

Fully modified pass-throughs

Agency pass-throughs that guarantee the timely payment of both interest and
principal. Related: modified pass-throughs
Functional currency As defined by FASB No. 52, an affiliate's functional currency is the currency of the
primary economic environment in which the affiliate generates and expends cash.

Agency pass-throughs

Mortgage pass-through securities whose principal and interest payments are
guaranteed by government agencies, such as the Government National Mortgage Association ("Ginnie Mae"), Federal Home Loan Mortgage Corporation ("Freddie Mac") and Federal National Mortgage Association ("Fannie Mae").

Conventional pass-throughs

Also called private-label pass-throughs, any mortgage pass-through security not
guaranteed by government agencies. Compare agency pass-throughs.

First-pass regression

A time series regression to estimate the betas of securities portfolios.

Modified duration

The ratio of Macaulay duration to (1 + y), where y = the bond yield. modified duration is
inversely related to the approximate percentage change in price for a given change in yield.

Mortgage pass-through security

Also called a passthrough, a security created when one or more mortgage
holders form a collection (pool) of mortgages sells shares or participation certificates in the pool. The cash
flow from the collateral pool is "passed through" to the security holder as monthly payments of principal,
interest, and prepayments. This is the predominant type of MBS traded in the secondary market.

Passive portfolio strategy

A strategy that involves minimal expectational input, and instead relies on
diversification to match the performance of some market index. A passive strategy assumes that the
marketplace will reflect all available information in the price paid for securities, and therefore, does not
attempt to find mispriced securities. Related: active portfolio strategy

Pass-through rate

The net interest rate passed through to investors after deducting servicing, management,
and guarantee fees from the gross mortgage coupon.

Pass-through securities

A pool of fixed-income securities backed by a package of assets (i.e. mortgages)
where the holder receives the principal and interest payments. Related: mortgage pass-through security

Pass-through coupon rate

The interest rate paid on a securitized pool of assets, which is less than the rate
paid on the underlying loans by an amount equal to the servicing and guaranteeing fees.

Passive investment strategy

See: passive management.

Passive investment management

Buying a well-diversified portfolio to represent a broad-based market
index without attempting to search out mispriced securities.

Passive portfolio

A market index portfolio.

Private-label pass-throughs

Related: Conventional pass-throughs.

Second pass regression

A cross-sectional regression of portfolio returns on betas. The estimated slope is the
measurement of the reward for bearing systematic risk during the period analyzed.

MACRS (Modified Accelerated Cost Recovery System)

A depreciation method created by the IRS under the Tax Reform Act of 1986. Companies must use it to depreciate all plant and equipment assets installed after December 31, 1986 (for tax purposes).

modified FIFO method (of process costing)

the method of cost assignment that uses FIFO to compute a cost per
equivalent unit but, in transferring units from a department,
the costs of the beginning inventory units and the
units started and completed are combined and averaged

Modified duration

The Macaulay duration discounted by the per-period
interest rate; i.e., divided by (1+rate/frequency).

Modified Accelerated Cost Recovery System (MACRS)

Depreciation method that allows higher tax deductions in early years and lower deductions later.

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