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Dear Alan, Jay, & Group,
Alan is right - the sirens sound every 15 minutes. The sirens remind the
floor traders that their filled order cards have to be submitted every 15
minutes to the exchange for clearing --- it prevents the floor from keeping
those cards until the end of the day, and therefore reduces the possibility
of mischief in terms of "readjusting" the times, prices, and #contracts upon
hindsight.
The only other exchange-made sounds that I am familiar with are the bells
(gongs). As I recall, an official rings the gong once one-minute before any
close, once 30 seconds before the close, 15 seconds ..., 5 seconds ..., and
at the close they ring it repeatedly. This can be a litle disconcerting to
an SP trader during the close of the meats and the currencies.
Sincerely,
Richard
Alan C. wrote:
> 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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