why are daily limits on exchanges?

Z

z106

Guest
WHat is the logic behind having a maximum amount something can rise on an exchange.

E.g. According to Bloomberg, last friday corn rose the max 20 cents allowed on teh chicago exchange.

I assume there are maximums for different things.

WHat is the logic of having these maximums?
 
I never heard of share price rises (and falls?) being capped and don't believe that markets impose such limits. Well other than perhaps zero or near zero when a share may be delisted.
 
I never heard of share price rises (and falls?) being capped and don't believe that markets impose such limits. Well other than perhaps zero or near zero when a share may be delisted.

Well it certainly applies for corn.

See link below.
http://www.bloomberg.com/apps/news?pid=20602013&sid=a9kF3m2TQTOA&refer=commodity_futures

And i also emember seeing it for other things.
So - anyone know why such a restriction exists?
Obviously there must be some logic behind it.
 
Oh - commodities? Maybe they are different. I'm pretty certain that there are no such limits on share price fluctuation. Maybe some commodities are subject to government or other (e.g. GATT) price controls or something like that?
 
Any use?