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Roberto Robatto @robertorobatto.bsky.social · 11/12/2024

This would would have not been possible without my great coauthors Andrea Orame (andreaorame.github.io) and Rodney Ramcharan (sites.google.com/site/rodneyr...)

andreaorame.github.io

Andrea Orame

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Roberto Robatto @robertorobatto.bsky.social · 11/12/2024

@fuster.bsky.social, Teodora Paligorova, and @vickeryjames.bsky.social study how banks manage their security portfolios, and their results confirm that historical cost accounting reduces the incentive to trade securities with unrealized losses (they have a lot of other interesting results too!)

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Roberto Robatto @robertorobatto.bsky.social · 11/12/2024

Dan Greenwald, John Krainer, and Pascal Paul find the same result about the impact of security valuation on bank lending (we study Europe, they look at the US). They do much more than we do, such as looking at hedging and building a structural model to estimate aggregate effects

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Roberto Robatto @robertorobatto.bsky.social · 11/12/2024

It's also great to see other papers that are looking into similar issues.

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Roberto Robatto @robertorobatto.bsky.social · 11/12/2024

This is likely because selling an "underwater" security with a market value less than historical cost implies recognizing the loss into regulatory capital, whereas keeping it in the balance sheet has essentially no impact on regulatory capital.

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Roberto Robatto @robertorobatto.bsky.social · 11/12/2024

We also show that accounting rules affect banks' trading behavior. When available-for-sale securities are valued at historical cost, banks do not sell them in response to the QE announcement, but they do when they are marked-to-market.

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Roberto Robatto @robertorobatto.bsky.social · 11/12/2024

... but there is a large pass-through when mark-to-market accounting is used. The channel works through capital gains that enter into regulatory capital. This is true not only for QE (in Italy/Europe, our focus) but also for any shock to the long-end of the yield curve.

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Roberto Robatto @robertorobatto.bsky.social · 11/12/2024

When monetary policy changes (long-term) yields, it affects the market value of securities. The main result is that the pass-through on bank lending (through the bank lending channel) is essentially zero when securities are evaluated using historical cost accounting...

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Roberto Robatto @robertorobatto.bsky.social · 11/12/2024

A thread on my paper on macroprudential (accounting) rules and monetary policy, out on the RFS! We study how the valuation of banks' security holdings affect banks' response to monetary policy. Main focus is lending, but we also study security trading t.co/uC3mnopeES

t.co

https://academic.oup.com/rfs/advance-article/doi/10.1093/rfs/hhae085/7921423

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Roberto Robatto @robertorobatto.bsky.social · 25/11/2024

Thinking about buying a Tesla because "it's good for the environment"? Think again: www.wsj.com/business/aut... Oh and hello everyone on Bluesky, this is my first post here! Feels good to have a place where there is truly freedom of speech (I'll try the same post on X, let's see what happens!)

wsj.com

As Musk Assumes Deregulation Role, Tesla Racks Up Pollution Violations

Texas Gigafactory ran afoul of environmental overseers; a faulty furnace door and hazardous wastewater.

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