A Sentiment Reversal in SPY
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Jason Goepfert
Published: 2021-09-27 at 07:35:00 CDT
Last week, traders become pessimistic about prospects for the world's most important ETF. Then, suddenly, they calmed down.
Early in the week, our Optimism Index (Optix) for the S&P 500 ETF fell to a pessimistic level below 10%. The Optix Index then normalized, surging above 50% in only a few sessions.
Dean conducted a study to identify the outlook for the S&P 500 ETF when the Optix Index falls below ten and subsequently increases above fifty in three trading sessions or fewer.
The results look good on an intermediate to long-term basis with several notable z-scores. As is the case with most mean reversion signals, the short-term performance can reflect choppy conditions associated with a bottoming process. And bear markets are unkind to short-term reversals.
Now, let's add a trend filter to find signals similar to last week. We'll include a condition that requires the SPY ETF to be trading above its respective 200-day moving average at the time of the sentiment reversal.
Except for the first two weeks, the results look excellent, with several notable z-scores. Context is always important.
What else we're looking at
- Full returns in SPY after short-term sentiment reversals
- A look at forward returns in China tech stock Tencent after a surge in corporate share buybacks
| Stat box According to Lipper, last week, investors pulled $6.7 billion from equity funds. That ended several weeks of inflows and was the largest single-week outflow since mid-July. It was the 4th-largest outflow of the year. |
Etcetera
Hong Kong correction. A 10-day average of the Optimism Index for the Hang Seng has dropped to its lowest level since the pandemic crash. It's nearing one of the lowest levels of the past 3 years.
Lights out. The McClellan Oscillator, a sign of internal breadth momentum, has plunged for utility stocks. It's trying to recover from a reading below -150, the 2nd-lowest reading in the past 3 years.
Is anyone optimistic? Our Optimism Index Geo-Map shows that pessimism is prevalent around the world. The only place with a hint of optimistic investors? Nigeria.
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The post titled A Sentiment Reversal in SPY was originally published as on SentimenTrader.com on 2021-09-27.
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