Tutti wrote:uempel wrote:BPNYA doesn't show any sign of weakness ...
kur.png
Hey Uempel - what is the math behind BPNYA? Not so much the NYA part, but the BP

What is it that it is displaying? Thanks.
Tutti, as to BPNYA: at the moment I consider it the best BP to assess SPX moves.
As to the idea behind BPs:I wrote this about a year ago. If you want more specific info, send me a pm.
Bullish Percentages show what percentage of an index' components are on a P&F buy signal. The BP shows the momentum of the market, of a specific index.
What is a P&F buy signal? A P&F chart shows us if an equity is on a „buy“ or a „sell“ signal.
Bullish Percentages add up all the „buys“ and „sells“ of an index (such as NYSE: BPNYA, SPX: BPSPX, DJIA: BPINDU, NASDAQ: BPCOMPQ). A number like BPSPX 70 tells us that 70% of the 500 components of SPX are on a „buy“ signal.
If an increasing amount of SPX components are on a P&F "buy" and BPSPX is up it's likely that SPX will move up too - and vice versa. BPs show the internal strength of the index.
The downside of BPs is that they are not capital weighted - whereas indices such as SPX are capital weighted (DJIA is the only exception). For instance: should three heavily weighted equities such as aapl, msft and xom shoot up 15% next Monday whereas all other components of SPX are slightly down SPX will be up - the three heavily weighted equities pull the index up. But BPSPX will be down, because a few of the 497 other components of the index will slide into a P&F „sell“.
Eventually such distortions will be corrected: a narrow market signals weakness and the index tends to follow its Bullish Percentage. But these distortions can go on for weeks.
Whoever wants to monitor distortions of BPSPX can check the daily moves of the heavily weighted equities in SPX. The percentage numbers here indicate their weight in SPX: aapl 4,97%, xom (Exxon) 3.24%, ibm 1.81%, ge 1.78%, msft 1.76%, cvx (Chevron) 1.75%, att 1.67%, pg (Procter) 1.44%, wfc (Wells Fargo) 1.42 % (hey, the most heavily capitalized bank in the US, everybody thinks Citi is numero uno!), jnj, goog, pfe, ko (Coca Cola),jpm, pm (Philip Morris), orcl, vz (Verizon), wm, intc, qcom - the weighting of Qualcomm is still 0.84% of SPX. Please note that these figures are a few months old.
© uempel