I believe It is like a clock chime.
It signals every 15 minutes.
Alan C.
---Jay Becker <jaymbt@xxxxxxxxxxxxx> wrote:
>
> Anyone know what that siren noise is that occasionally goes off in the
> S&P 500 pit? I can hear it in the squawk box, but not sure what it
is.
>
> Jay Becker
>
>
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