Re: S&P 500 Index Cash Symbol (SPY)

["Gary Fritz" <fritz@xxxxxxxx>]

I wrote:
> This has always confused me.  Why does SPY on my BMI feed show a 
> closing price on 8/24 of 1088.13 -- exactly identical to the SPX 
> closing price?  

Thanks to some pointers from Jay Mackro and Ira <ist@xxxxxx>, I think 
I've figured this out.

Ira said the SPY I was seeing was identical to SPX, but broadcast 
from NY instead of Chicago.  (Why?  I have no idea.  Nor do I know 
why these supposedly-identical indices sometimes differ by a few 
ticks.)  Apparently the symbol SXY is a similar clone of OEX.

Following a suggestion from Jay, I dug around in my symbol universe a 
bit, and discovered *three* SPY symbols:

  * The SPY *index* from CME.  This is the same-as-SPX index 
    that I had in my portfolio.

  * A SPY stock (Serenpet Inc) traded on the TSE.

  * A SPY *stock* on AMEX -- "Standard & Poor'S Dep Receipts".
    Bingo!

I've deleted my previous SPY symbol and replaced it with the SPDR.  
For some reason I haven't started receiving any data on it yet, but 
presumably I will eventually.

Gary