Agency mortgage backed securities (MBS) with diverse characteristics are traded in parallel with individualized contracts in the specified pool (SP) market and with standardized contracts in the to-be-announced (TBA) market. We find that this unique parallel trading environment significantly...

Investors can trade individual agency mortgage-backed securities as specified pools (SPs), or trade them through TBA forward contracts. Sellers in the TBA market deliver the cheapest possible pool that fulfills the contracts, so they are traded on a cheapest to deliver basis. More valuable...

We examine the introduction of mandatory post-trade reporting in the TBA mortgage-backed securities market. With post-trade reporting, trading costs fell for institutional investors. Trading costs declined more for investors' trades with peripheral dealers than for their trades with core...

Mortgage dollar roll is the most common financing strategy for agency MBS. Effectively a collateralized loan, it differs from repos in two important ways: the returned collateral can differ from those received, and the MBS ownership changes hands in the funding period. Therefore, dollar roll...

Measured as yield spreads against AAA corporate bonds, the convenience premium of agency MBS averages 47 basis points over 1995 - 2021, about half of the long-term-Treasury convenience premium. Both MBS convenience premium and issuance amount depend on mortgage rate negatively, consistent with a...

An expansion in mortgage credit to subprime borrowers is widely believed to have been a principal driver of the 2002–2006 U.S. house price boom. By contrast, this paper documents a robust, negative correlation between the growth in the share of purchase mortgages to subprime borrowers and...

An expansion in mortgage credit to subprime borrowers is widely believed to have been a principal driver of the 2002-06 U.S. house price boom. Contrary to this belief, we show that the house price and subprime booms occurred in different places. Counties with the largest home price appreciation...

In March 2020, massive customer selling of U.S. Treasury securities and agency mortgage-backed securities (MBS) triggered by the COVID-19 pandemic overwhelmed dealers' capacity to intermediate trades, contributing to a marked deterioration of market functioning. The Federal Reserve promptly took...