AMZN has a beta of .37 does this make sense

I thought beta was... defined as such

If a stock has a beta of 2
If the mkt goes up 1%, the stock will go up 2%


according to yahoo... amzn has a beta of .37.


Anyone have any idea as to why this is such?

 

it does sound Low,
without looking up anything

on the other hand,
the market is up 3% today, and AMZN is only up 2% tops

marc

 

Google finance has beta of 1.01

http://www.google.com/finance?q=NASDAQ:AMZN&authuser=0

 

bloombrg has a beta of 1.307 and adj beta of 1.2

2 year weekly data.

that makes the most sense.

 

CNBC has it having a beta of 1.02

 

You fellas still using one of them old beta max machines?

 

Check what lookback Yahoo is using. If you want to bother, you could back it out by iterating thru, X days, X+1 days... till you find the beta they show.

On 10/26, AMZN fell ~$30 while SPY was up ~$1.25. A monster datapoint like that will heavily influence a regression, especially on a short lookback.