Monday, December 10, 2007

Surges in Stocks Making New Highs: What They Mean

One of the indicators I track most carefully is the number of stocks across the NYSE, AMEX, and NASDAQ that are making fresh 20-day highs and lows. This is more sensitive than the more common count of 52-week new highs and lows. Above we have the 20-day new highs minus lows on a daily basis during 2007. There's been a distinct tendency for this measure to top out ahead of price during cyclical swings; extreme negative values have represented good buying opportunities.

As I noted in the Trading Psychology Weblog, we've had a surge in buying over the past two weeks, with the Adjusted NYSE TICK positive for 11 of the past 12 trading sessions. Over that same time, we've gone from a situation in which we've had over 1000 new 20-day lows to one in which we're now seeing more than 1000 new 20-day highs.

I went back to October, 2002 (N = 1279 trading days; which is when I began compiling data for 20-day new highs/lows) and examined situations in which we have surged from a surplus of new lows to one of new highs. Specifically, I looked for occasions in which the 20-day average of new lows has been above 1000, but the current day's reading of new highs has been over 1000. This captures a situation in which we've had a broad surge of strength following an oversold market.

There have been 32 instances of such surges in new highs since late 2002. Twenty days later, the S&P 500 Index (SPY) has averaged a gain of 1.90% (27 up, 5 down). That is much stronger than the average 20-day gain of .79% for the remainder of the sample (822 up, 425 down).

To be sure, there have been pullbacks along the way: 11 of the 32 instances were actually lower after five days. Nonetheless, broad surges in market strength have tended to be followed by further strength over the next month. On average, it's paid to use these pullbacks as buying opportunities.


What Happens After Short-Term Surges in New Highs

Stalking the Market With New Highs/Lows

Anticipating Market Turns With New Highs/Lows


Brandon Wilhite said...

Dr. Brett,

I just wanted to point out that the television media is also often...mmmmm...mistaken let's call it, about the effects of news. A few examples, which I've seen too many times:

Scenario 1: USD, or pick any currency, has been steadily gaining all day. Some type of news comes out which is supposed to be USD bearish, and on that news the dollar does in fact drop a small bit, but then goes on to make up the losses and even get stronger than it was before.

Scenario 2: They report some currency as being strong or weak on the day. But I've been watching it for 8 hours already, and I can certainly tell you that said currency is actually doing the opposite. I think this might be due to them defining their 'trading day' for that currency at a different start point and then basing all of their statements solely on that.

Scenario 3: They say something like "Fed so-and-so's speech (or put in some other bit of news) is probably why 'x' happened." But again, I've been watching things for quite awhile now, and the moves they are referring to were either finished by that time, or well under way.

Needless to say, I don't really watch the television much while I'm trading, and I certainly don't believe anything they say about 'x causing y,' at least not in my own markets. They've been wrong too many times for me to put any type of trust in this. I do think there is some value in some of the macro-economic type of comments/analysis that the various guests offer. But again, you still have to do a lot of filtering there.


Brett Steenbarger, Ph.D. said...

Hi Brandon,

Excellent observations. Nothing substitutes for seeing and evaluating markets for yourself!


Brandon Wilhite said...

Oops, I meant to put this comment on the post before this. Adam gave another great example in the comments there.


Anatrader said...


I have been cautioned not to follow market opinions expressed in the media especially on TV, just before a FED's announcement in particular.

However, for today, I have to say it is hard to be contrarian when we all seem to expect some kind of rate cut.