Why Are the NYSE Bullish Percent Signals Failing?

Yes, Wednesday’s decline was yet again another Lowry’s 90-90 day and it took us perilously closer to the ledge. Or over the ledge, depending on which index you’re looking at and how thick you draw your support lines. Weinstein’s support level is still not breached, for whatever that’s worth. Is everything lost? I turned to an ancient way of looking at the health of a market.

You already know how to use bullish percent indices to time the stock market. Although they are usually shown in point and figure charts (those X’s and O’s), I prefer to look at a line chart because it moves in tandem with time and the market proxies like the NYSE index, Dow Jones and S&P 500.

But the original way that bullish percent charts were interpreted was to gauge where we were along a continuum of bull or bear market. The short version is that when the NYSE bullish percent index moves up above the 70% line and closed below it, the market is on notice. Similarly, when the NYSE bullish percent index moves lower than 30% and then breaks above it, there is an indication of underlying health, and a portent of a nascent bullish rally.

Looking at a very long term chart of the NYSE bullish percent index, it is easy to see the efficacy of this measure of market internal health:

Recently though, the NYSE bullish percent index has been breaking down through the 30% level not only often but to such a degree that it has fallen lower than it did after the Black Monday crash of 1987.

Here’s a chart zooming into the past two years to show more detail:

Each successive piercing of the 30% “maginot line” brings about a weaker and weaker counter rally from the market. Until in July, the market barely manages to plateau before falling again. So what’s up? Why is this once solid indicator start to sputter and fail so badly?

My hunch is that what changed over time was the inclusion of non-equity securities on the big board. Right now half of the securities traded on the NYSE are closed-end funds, ETFs, ADRs, municipal bond funds and other funny pieces of paper that do not represent fractional ownership of a public company as it used to when traders started pushing paper under the Buttonwood tree.

This is why Lowry Research service started to keep “operating company only” NYSE data. Speaking of Lowry’s, I went to a presentation by one of their analysts last night and will share the details with you tomorrow.

Comments

[Smarty_Pants:]

"So what’s up?"


Ummm ... it's a bear market? Best you could hope for from this 'indicator' is to time trades from the short side when it peaks and starts down. If you follow Weinstein then you should know better than to buy stocks during a Stage 4 market phase, as he defines it.

2008 Nov 20 12:11 PM

[Smarty_Pants:]

Interesting picture BTW.

2008 Nov 20 12:13 PM

[gon4beer:]

I have a friend who has worked for Lowry's as their chief market technician for years. They are a very good service if you pay attention to technical happenings in the market.

2008 Nov 21 12:45 PM