ECBetas in Equity Strategy Returns
A new study reveals that European Central Bank (ECB) monetary policy surprises have a strong impact on equity investment strategies. Strategies with low OIS (Overnight Index Swap) betas earn higher returns and Sharpe ratios, especially during policy announcement windows. The effect is strongest for shocks to short- and medium-term rates, forming a tent-shaped return pattern. The research uses advanced asset pricing methods and highlights that the risk premium is driven mainly by immediate policy announcements, not press conferences.
What it examines
This paper studies how European Central Bank (ECB) monetary policy surprises affect returns of 153 equity investment strategies. Using high-frequency data and advanced asset pricing methods, it examines whether strategies more exposed to monetary policy risk earn higher returns, focusing on the euro area for clear identification.
What it concludes
The study finds that equity strategies more sensitive to ECB policy shocks earn higher returns, especially around policy announcements. This insight helps investors manage risk and design better strategies. The results can guide asset managers, policymakers, and researchers, and suggest future work on other regions or types of financial assets.
Evidence objects
Researchers reveal that equity strategies with low 'OIS betas'meaning high exposure to unexpected ECB policy movesconsistently earn higher excess returns and Sharpe ratios, especially during the ECB press release window.
key_findings bullet 1 · key_findings · validation V0
The study finds a 'tent-shaped' risk-return pattern, with the strongest effects for monetary shocks impacting short- to medium-term rates (6 months to 2 years), and introduces 'ECB betas' for equity factors using advanced asset pricing methods.
key_findings bullet 2 · key_findings · validation V0
Notably, the risk premium is driven by immediate policy announcements, not press conferences or speeches, and the research uniquely focuses on systematic factor portfolios, leaving open questions about country effects and unconventional policies.
key_findings bullet 3 · key_findings · validation V0
This paper uniquely links ECB monetary policy shocks, measured via high-frequency OIS surprises, to systematic equity factor returns across 153 long-short portfolios. Its innovative use of granular euro-area data and focus on factors, not indices, offers fresh insights, revealing tent-shaped risk premia and press release window effects, advancing asset pricing research.
key_findings bullet 4 · key_findings · validation V0
Raw abstract and provenance
returns and Sharpe ratios. Results strengthen using asset pricing methods that account for measurement errors and omitted variables. This risk premium
Source row: 666 · abstract type: snippet