Inventory buyers cherished Alan Greenspan as a result of the insurance policies he pursued throughout his tenure as chair of the US Federal Reserve benefited the fairness markets. No less than that was the standard knowledge.
However did the markets mirror this narrative on days when Greenspan testified earlier than Congress? Did they have an inclination to go up as we’d count on, or did their efficiency contradict the narrative? And the way did the markets reply when Jerome Powell and different Fed chairs testified? What does their habits reveal about how they assessed every Fed chair?
To reply these questions, we pulled S&P 500 and MSCI market and asset class knowledge for all dates on which the final 5 Fed chairs testified earlier than Congress and in contrast the outcomes with each every day common returns and common return volatility.
To raised isolate market sentiment round every Fed chair, we didn’t embrace Fed charge announcement days in our evaluation. The Fed had already communicated its charge choices to the general public prior to every Fed chair’s congressional look, and the market had presumably taken the choice — to hike, maintain, or cut back charges — under consideration.
So, how did the markets reply to the testimony of every Fed chair? Had been there any standouts or surprises?
Because it seems, Janet Yellen generated probably the most optimistic returns on the times when she testified relative to the 4 different Fed chiefs. On common, the S&P 500 rose 0.20% when Yellen spoke and solely 0.08% when Greenspan testified.
On the opposite finish of the spectrum, days when Ben Bernanke or Powell testified are related to extra damaging inventory market efficiency. The S&P 500 returned –0.05% on common on days when Powell or Bernanke appeared earlier than Congress. After all, Bernanke helmed the Fed in the course of the world monetary disaster (GFC) and Powell throughout a interval of resurgent inflation. So, the bearishness they evoked is probably not particularly shocking.
Fed Chair Congressional Testimony Common Returns: One-Day Window (%)
| Paul Volcker | Alan Greenspan | Ben Bernanke | Janet Yellen | Jerome Powell | |
| S&P 500 | –0.03 | 0.08 | –0.05 | 0.20 | –0.05 |
| Small-Cap Fairness | 0.04 | 0.06 | –0.15 | 0.07 | 0.00 |
| Progress Fairness | –0.03 | -0.02 | –0.01 | 0.08 | –0.11 |
| Worth Fairness | 0.00 | 0.03 | –0.08 | 0.28 | 0.06 |
| Internationwide Fairness | 0.10 | –0.02 | 0.01 | 0.05 | –0.23 |
| Complete Bond Index | 0.07 | 0.03 | 0.09 | –0.05 | 0.01 |
| Excessive-Yield Debt | 0.06 | 0.04 | 0.02 | 0.09 | 0.00 |
| Brief-Time period Debt | 0.02 | 0.02 | 0.01 | –0.01 | -0.01 |
We see comparable outcomes play out throughout small-cap and worldwide equities in addition to worth and progress, with Yellen testimony days yielding higher returns than Greenspan’s. We repeated our assessments over a three-day window across the Fed chairs’ congressional testimony and once more generated qualitatively comparable outcomes.

Bonds instructed a distinctly totally different story, nevertheless. Whereas equities outperformed when Yellen testified, mounted revenue went in the other way, with the entire bond index returning –0.05% on days when Yellen appeared earlier than Congress.
Volatility was one other datapoint we explored, with Bernanke testimony days displaying probably the most volatility general.
Normal Deviation of Returns round Fed Chair Testimony Days
| Paul Volcker | Alan Greenspan | Ben Bernanke | Janet Yellen | Jerome Powell | |
| S&P 500 | 0.88 | 0.93 | 1.40 | 0.52 | 0.77 |
| Small-Cap Fairness | 0.57 | 0.86 | 1.72 | 0.67 | 0.91 |
| Progress Fairness | 0.35 | 1.17 | 1.30 | 0.82 | 0.85 |
| Worth Fairness | 0.93 | 0.93 | 1.56 | 0.55 | 0.83 |
| Internationwide Fairness | 0.55 | 0.84 | 1.37 | 0.81 | 0.97 |
| Complete Bond Index | 0.16 | 0.29 | 0.27 | 0.25 | 0.17 |
| Excessive-Yield Debt | 0.18 | 0.23 | 0.35 | 0.11 | 0.12 |
| Brief-Time period Debt | 0.08 | 0.08 | 0.04 | 0.04 | 0.03 |
Of all of the Fed chairs, Yellen generated probably the most optimistic inventory market reactions and the least volatility over the previous 50 years, whilst bond buyers tended to reply negatively to her testimony.
In any other case, each Powell’s and Paul Volcker’s tenures featured numerous rate of interest hikes in response to rising inflation. The weaker efficiency of equities on their testimony days could mirror how the markets got here to affiliate them each with increased charges.
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All posts are the opinion of the writer(s). As such, they shouldn’t be construed as funding recommendation, nor do the opinions expressed essentially mirror the views of CFA Institute or the writer’s employer.
Picture courtesy of the US Federal Reserve
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