Alp Simsek Profile
Alp Simsek

@alpsimsek_econ

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Finance professor at the Yale School of Management. Research in macroeconomics and finance. Tweets in English and Turkish.

Joined June 2013
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@alpsimsek_econ
Alp Simsek
2 days
1/ New paper: "FCI-star" with Ricardo Caballero and @TomasCaravello. We introduce FCI*—the neutral level of financial conditions that closes the output gap. Think of it as the analogue of r*, but for the broader financial conditions that actually drive monetary transmission
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@alpsimsek_econ
Alp Simsek
2 days
RT @VMRConstancio: @alpsimsek_econ @tomascaravello A relevant paper, presenting a possible improvement over the useless r-star. To be scru….
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@alpsimsek_econ
Alp Simsek
2 days
Thanks @nberpubs! Here's a thread breaking down our methodology and key findings - including why FCI* stayed stable after 2008 while r* crashed, and how FCI gaps captured the 2022 policy shift before rate gaps:.
@nberpubs
NBER
3 days
Introducing FCI* (Financial Conditions Indices), the neutral level of financial conditions that closes output gaps. FCI gaps—difference between FCI and FCI*—better reflect monetary policy stance than rate gaps, from Ricardo J. Caballero, @tomycaravello, and @alpsimsek_econ
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@alpsimsek_econ
Alp Simsek
2 days
Glad you found it interesting! Here's a thread breaking down the key findings:.
@int_mon_econ
International and Monetary Economics Network
3 days
Wow, super interesting!. "FCI-star" by Ricardo J. Caballero, Tomás E. Caravello, and Alp Simsek. "We introduce FCI*, the neutral level of financial conditions that closes expected output gaps, within a framework where financial conditions and macroeconomic shocks drive economic
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@alpsimsek_econ
Alp Simsek
2 days
11/ Quick correction: My coauthor's handle is @tomycaravello. Apologies for the mix-up, Tomas!.
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@alpsimsek_econ
Alp Simsek
2 days
10/ Bottom line: Central banks should focus on financial conditions relative to their neutral level (FCI*), not just interest rates relative to r*. It's a better guide for what monetary policy is actually doing to the economy. Paper: /end 🧵.
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@alpsimsek_econ
Alp Simsek
2 days
9/ Policy implications:. - Financial conditions matter more than policy rates for economic impact. - Markets move faster than central bank actions BUT are also noisy. - We need frameworks that capture these realities: FCI* provides a more stable, comprehensive benchmark than r*.
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@alpsimsek_econ
Alp Simsek
2 days
8/ ⚡ FCI gaps provide superior real-time guidance during periods of rapid change. In 2022, FCI gaps correctly captured the sudden policy shift while interest rate gaps still showed accommodation well into 2023
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@alpsimsek_econ
Alp Simsek
2 days
7/ 📉 Large FCI gaps emerge because markets often move contrary to macroeconomic needs. During recessions: observed FCI typically tightens (financial distress) while FCI* loosens (economy needs stimulus). These gaps suggest there is room for policy improvements
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@alpsimsek_econ
Alp Simsek
2 days
6/ Three key empirical findings:. 📈 FCI* is more stable than r*. After 2008, r* plunged and stayed low as falling asset prices reduced spending and forced the Fed to cut rates. But FCI* remained stable because it tracks ONLY macro shocks & needs, not financial market volatility
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@alpsimsek_econ
Alp Simsek
2 days
5/ Our estimation approach follows Laubach-Williams . If there is an output gap, observed FCI is "wrong" relative to macro needs. Using estimated output gaps and the observed FCI, we can back out the neutral level FCI* that would close output gaps
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@alpsimsek_econ
Alp Simsek
2 days
4/ We use the FCI-G index from Fed economists that leverages the Fed's internal models to estimate how recent changes in financial markets affect output next year. Stocks and exchange rates are the main drivers, with housing important before and during the GFC
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@alpsimsek_econ
Alp Simsek
2 days
3/ This happens because monetary policy works through FINANCIAL CONDITIONS—long rates, asset prices, credit spreads so on—not policy rate itself. Yet we anchor everything around r*. Markets are forward looking and noisy, so effective policy deviates from what policy rate suggests.
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@alpsimsek_econ
Alp Simsek
2 days
2/ Why does this matter? . In 2022, monetary policy became tight in anticipation of rate hikes—months before the Fed raised rates. In 2024, policy became loose due to the stock boom, despite rates staying high. The policy rate alone is a terrible guide to effective policy stance
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@alpsimsek_econ
Alp Simsek
15 days
RT @cepr_org: New CEPR Discussion Paper - DP20362.FCI-Star.Ricardo Caballero & Tomás Caravello @MITEcon, Alp Simsek @alpsimsek_econ @YaleSO….
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@alpsimsek_econ
Alp Simsek
1 month
RT @LHSummers: The @realDonaldTrump Administration's vendetta action against Harvard is now over the top. It is crazy to make enemies of t….
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@alpsimsek_econ
Alp Simsek
1 month
RT @NatashaRSarin: This is unlawful, un-American, and ultimately -- like so much we've seen recently -- will serve to make this country les….
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@alpsimsek_econ
Alp Simsek
1 month
RT @jasonfurman: I just finished meeting with one of our amazing international students who is graduating and was reflecting on their exper….
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@alpsimsek_econ
Alp Simsek
3 months
RT @florianederer: I am delighted to announce that my student @asil_aslihan will join Duke Law School this summer. Asli has several terrif….
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@alpsimsek_econ
Alp Simsek
4 months
Today is a sad day for Turkey, my home country. The popular mayor of Istanbul, who beat Erdogan's proxies twice in local elections, was detained on flimsy charges. Erdogan joins the ranks of cowards like Putin who use "legal" means to sideline opposition leaders they fear. Turkey.
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