Late-Day Market Surges Revisited
Some people astutely noted that this study on late-day market surges triggered on Friday. Unfortunately, since the original publication, the edge has not persisted. Below is an equity graph to demonstrate.
Some people astutely noted that this study on late-day market surges triggered on Friday. Unfortunately, since the original publication, the edge has not persisted. Below is an equity graph to demonstrate.
As of the close on Wednesday the Capitulative Breadth Indicator (CBI) was at 4.
With prices at the current levels as of 2pm Thursday the CBI is set to spike to 16.
This is an extremely oversold level. Ten and above has often led to market bounces. Not always immediately, though. It got up into the 40’s in July 2002 and October 2008.
For more on the CBI and what this all suggests you may want to check out the CBI posts.
https://quantifiableedges.blogspot.com/search/label/CBI
For more CBI updates toward the close you may follow me on Twitter.
Below is a study that appeared in last night’s Subscriber Letter that looks at Tuesday’s volatile action.
A few notes:
1) While results are explosive, instances are very low. Rather than including this among my Active Studies List I have simply decided to track it going forward.
2) Without the 200ma filter the results are no longer bullish. There were some big declines followingthis type of action during a downtrend.
Breadth that was so extremely negative as was seen on Friday is rare. It is especially rare when the market is not already downtrending and reaching oversold levels. The NYSE Up Volume % of 4.5% suggests nearly everything was being sold. Indiscriminate selling like this hints at panic. Below is a study last shown on the blog on February 5th that exemplifies this.
Instances are low, but with all 7 bouncing in the next day or two I believe it’s worth noting and perhaps considering now, and then tracking going forward.
Striking about Monday’s rally was the very low volume in the Nasdaq. It not only fell below the high levels achieved during Thursday and Friday’s wild trading, but it actually posted the lowest volume in over a week. This brought about a compelling study from the May 19,2009 blog post. I’ve updated that study below:
As of now the market is gapping up very strongly on bailout news. SPY is up over 4% as I type. I looked back to find other instances of monster gaps and how the market behaved on those days. For this study I required the gap to be at least 3%. Results below.
Only 4 instances make it dangerous to draw any solid conclusions. I’ll let readers do their own interpretations. I would note that all 4 instances took place in September or October of 2008.
So the big question I got yesterday from readers was “What’s the CBI reading?” For those new to the blog the CBI is my Capitulative Breadth Indicator. There is a system I’ve traded since 2005 that I call my Catapult System. It basically looks to buy into S&P 100 stocks that are undergoing capitulative selling. The CBI measures the number of active triggers. When it moves up to levels of 7-10 or more it suggests the market as a whole is becoming oversold to the point that a reversal is highly likely. Extreme selloffs like October 2008 and September 2001 have seen it go much higher (into the 40’s). I wrote many posts about the CBI in 2008 and 2009 since there were so many selloffs that induced high readings. For more information and related research you may us the link below.
https://quantifiableedges.blogspot.com/search/label/CBI
Also, below is the original CBI intro post and explanation.
https://quantifiableedges.blogspot.com/2008/01/my-capitulative-breadth-indicator.html
Since the March 2009 bottom the CBI has not had a significant reading, with the highest only reaching 3. It hit 2 a few days ago and even with yesterday’s selling did not move any higher. Though I checked in the middle of the 2:45 madness and if the market closed there it would have been a “6”. A high CBI is certainly not required for a rally, but I’m personally more comfortable getting aggressively long when I see it.
Should the CBI spike higher over the next few days I will be sure to note it here. And as always I will share the individual Catapult trades that make up the CBI in the Subscriber Letter.
What struck me most about Wednesday’s action was the fact that the market closed above it’s open but still down on the day. This little pattern can be bullish under the right circumstances. It will often signal a reversal after there has been a move down.
I showed a few studies related to this in last night’s subscriber letter. Below is one.
As probably 99% of the people who read Quantifiable Edges are aware, the Traderfeed blog, written by Dr. Brett Steenbarger is nearing an end.
Over the last several years Dr. Brett’s provided a wonderful example for traders, bloggers, and service providers. The energy he put towards the blog and the rest of his work was astounding. His posts were consistently thought provoking and provided many sparks for further research on this site and others. And he’s done it with the kind of integrity not often found on Wall St.
Quantifiable Edges would have come to be without Dr. Brett. But without his inspiration, support, and encouragement throughout the last few years it certainly wouldn’t be as far along as it currently is. Any blog readers or subscribers who have benefitted from my work should be aware that some credit needs to go to the good doctor.
As readers know, I try to quantify most everything here. While it’s impossible to quantify Dr. Brett’s contribution, below is a never-before-seen picture that tells a (true) story of something that happened back in 2008…

Of course that’s just one small example.
Thank you Dr. Brett. Congratulations on your new endeavor. Whoever convinced you to join their firm will surely benefit greatly, just as so many others have over the years. While you will soon be silent on the internet, I look forward to eventually hearing of the good things you’ll accomplish in the next several years.
Monday is the 1st trading day of May. I’ve discussed many times before how the 1st trading day of the month tends to be seasonally bullish. Last July I showed a chart breaking it down by month. May has been one of the strongest months, both based on total return and % profitable. Below is a graph showing performance on the 1st day of May since 1987.
These would seem to strongly favor a bounce on Wednesday. In last night’s Letter I included all the individual instances along with some additional discussion.
The NDX has now had a remarkable streak of 50 closes above the 10ma. That’s over 2 months without even a mild pullback. This is the longest streak since the index’s inception in 1986. Below is a chart that shows the number of days the NDX has spent above it 10ma at any point in time.
It’s a little difficult to read when try to jam so much history into a small area, but the spike on the right is the current count and it is up to 50. The previous high lasted 47 days in 1989.
In last night’s Subscriber Letter I also discussed research associated with long streaks in the Dow (now at 48 days) and S&P (recently ended at 42 days). The general finding was that such persistent upmoves have a very strong tendency to continue up after the 1st pullback occurs. Rarely will you see an abrupt end to these kind of moves.
If you’d like to see that research then you may take a free trial by clicking here. If it’s been more than 6 months since your last trial you may email me at support @ quantifiable edges.com (no spaces) and I’ll be happy to set you up with one.
It took a strong turnaround to get the SPX back into positive territory by Thursday’s close. I looked at this several different ways last night in the Subscriber Letter. Below is one study I ran that suggested mildly bearish implications.
This seems to indicate that when it takes a lot to close up just a little you’re likely to see a pullback short-term. Not a huge edge here, but some suggestion that the SPX could struggle the next day or two. I wouldn’t normally base a trade solely on this, but I do think it is worth noting and keeping in the “bag of tricks”.