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Reading the put/call ratio at extremes
The CBOE equity put/call ratio closed Friday at 0.43. That is the lowest single-day reading since 8 November 2024, when the index sat at 5,995 and would proceed to chop sideways for another six weeks before the December melt-up. Single-day extremes in this series are noisy — the ten-day moving average is what most desks watch — but the ten-day is also flashing: it printed 0.51, the 7th percentile of the post-2010 distribution.
For a sentiment indicator that almost everyone now claims to have stopped using, the put/call ratio is still doing what it has always done: telling you when the marginal options-buying public is positioned in one direction so heavily that the next surprise is almost mechanically going to come from the other.
The question is what to do about it.
The two series, and why they disagree
There are two put/call ratios that get quoted as if they were the same number, and they are not.
Equity put/call (CPCE on Bloomberg / $CPCE on most charts). This is the ratio of put volume to call volume in single-stock options. It captures the retail-and-small-fund tail and is the cleaner sentiment read. Friday: 0.43.
Index put/call (CPCI). Ratio across index options — primarily SPX, NDX, RUT. This is dominated by institutional hedging flow and behaves almost opposite to the equity series at most points in the cycle. Friday: 1.27. The 10-day average sits at 1.21 — the 76th percentile of its distribution.
You read those two prints together and the picture is unambiguous: retail is pressed long single names, institutions are paying up for index downside. That is a textbook late-stage rally configuration, and it is the most common configuration to precede a 3–6% pullback. Not a top. A pullback.
What the historical record actually says
I have looked at every instance since 2010 where the 10-day equity put/call ratio dropped below 0.55 while the 10-day index put/call ratio sat above 1.15. There are 27 such instances. The forward returns:
| Horizon | Hit Rate (S&P down) | Median Return | Worst |
|---|---|---|---|
| 5 days | 56% | -0.6% | -3.1% |
| 10 days | 63% | -1.4% | -5.8% |
| 21 days | 67% | -2.2% | -8.4% |
| 63 days | 41% | +1.1% | -11.2% |
Two readings. First, the signal works at the 1-to-3-month horizon, then it stops working. By month three the median return is positive again — the rally that produced the sentiment extreme typically wins out, even after a brief correction. Second, the worst drawdowns from this signal are non-trivial. February 2018, October 2018, February 2020 and August 2024 all printed this configuration in the 21 trading days preceding the drawdown. The configuration is not a cause — it is a symptom of crowded positioning. But the symptom has been a leading indicator nine times out of ten major drawdowns since 2010.
That ratio — sentiment extreme to drawdown — is high enough to take seriously and not high enough to be definitive. Anyone who tells you the put/call ratio is "predictive" is being loose with language. Anyone who tells you it has stopped working is missing what it has actually been doing.
Why this print specifically
Three things are different about the May 2026 setup versus historical comparables.
First, the VIX is sitting at 13.84 — also a low-percentile print, but well above the 11.5 reading that accompanied the November 2024 equity put/call low. The market is pricing some volatility, just not enough to make hedging cheap. The 1-month SPX skew (25-delta put vs 25-delta call) is at the 84th percentile: institutions are paying up not just for hedges but for tail hedges specifically. The volatility surface is internally consistent with the put/call disagreement.
Second, single-stock dispersion is high. The 30-day realised correlation between S&P 500 names is 0.18, near a multi-year low. This means equity options demand is genuinely concentrated in a small number of names — not a broad bullish stampede but a narrow one. Pre-earnings call buying on NVDA, AVGO, AMD, MSTR and PLTR alone accounts for about 18% of the May equity call volume, according to OCC weekly stats. Strip those five names out and the equity put/call moves back to ~0.62, well off the extreme.
Third, rates are not where they were the last time we saw this. The 10-year is at 4.39% versus 4.30% in November 2024. The carry trade that funded last cycle's call-buying has worse maths today. Marginally — but enough that the unwind, if and when it comes, will be quicker than it was in early 2025.
What I am actually doing about it
I will not pretend to have a clever options structure to recommend. The honest read of this signal is positioning, not directional.
The two adjustments I have made:
Cut net long exposure on the cyclical/momentum book by 15%. Specifically trimmed the names with the highest 30-day call/put skew (largely the AI-infrastructure cohort — VRT, PWR, ETN, AVGO). Not because I have changed view, but because position size should track the risk environment, and the risk environment got marginally worse this week.
Cheapened existing SPX hedges. I rolled June 5,100 puts to July 5,000 puts at a credit, accepting more theta in exchange for keeping the same dollar tail protection. With realised volatility low and the index-level put surface bid, this is one of the better hedge-roll conditions of the year so far. The trade is uninteresting in isolation; it is interesting because the volatility surface is rewarding patience for the first time in three months.
I am not selling the rally. I am not putting on a bearish trade. I am paying attention to what the two put/call series are telling me, sizing accordingly, and re-reading the Hoover speech transcript Friday afternoon ahead of Powell's speech this week.
The follow-up to watch
The cleanest tell will be whether the equity put/call 10-day can stay below 0.55 through the Powell speech on Friday. In 22 of the 27 historical setups, the 10-day average rebounded above 0.60 within the following five sessions — not because sentiment shifted, but because somebody got nervous enough to buy a put. The five instances where it stayed below 0.55 produced the four worst forward 21-day drawdowns in the dataset. A persistently complacent equity P/C across a high-vol macro week is the strongest signal this indicator has ever given.
We will know by Friday's close.
Data sources: CBOE Daily Market Statistics, OCC Statistics, Fed speech calendar, realised-correlation series from Cboe Implied Correlation Index (COR3M). Historical signal-test dataset constructed from public CBOE archives; methodology notes available on request.