疑問﹕開市 vs 昨日收市

zerolord

為什麼開市位不承接昨日收市位﹖

太空飞人

開市的前一天收市的时候就要做决定了。。。

zerolord

arnofren

On the 21 August 2000, the Singapore Exchange Securities Trading (SGX-ST) will
start the new Pre-Open and Pre-Close Routines for the stock market.
When implemented, these routines will increase efficiency in order-matching,
enhance market integrity, and extend accessible hours for investors.

Pre-Open Routine:
The Pre-Open Routine is a 30-minute session before regular trading starts at
0900 hrs. It comprises the Pre-Open Period and the Non-Cancel Period.
During the Pre-Open Period (0830 - 0859 hrs), buy and sell orders can be entered,
amended or withdrawn. However, they will not be matched and executed during this
period.
The Non-Cancel Period is between 0859 and 0900hrs, during which input, amendment
and withdrawal of orders are not permitted. Orders that can be matched are executed
at a single computed price, which will be the same as or better than the price
at which the orders are entered. This computed price shall be the opening price
for the day. Unmatched orders will be carried forward into the regular trading
session.
This routine facilitates the smooth flow and matching of orders once the regular
trading session starts.

Pre-Close Routine:
At 1700 hrs, all unmatched orders are carried forward to the Pre-Close Routine,
which runs for 6 minutes and consists of a Pre-Close Period and a Non-Cancel
Period.
Similarly, orders can be entered, amended or cancelled during the Pre-Close Period
(1700 - 1705 hrs).
During the Non-Cancel Period (1705 - 1706 hrs), orders are matched and executed
at a closing price computed for the day, while unmatched orders will become void.

This routine makes it difficult for anyone to manipulate closing prices with
a single transaction at an unusually high or low price, just before the trading
session ends.

mm_lee

这应该是所谓的跳空或掉空吧?
比如说A公司股价昨天闭市是1.00,
晚上美国股市大起,第二天买家看好A而直接用1.20价买进.
所以是没有通过1.01-1.19价位的.