你是用什么软件看股的阿？
直接在SGX网站看吗？求指点~

图上很清楚呀
iOCBC.

富指換馬 港股波動成交逾千億
http://www.mpfinance.com/htm/finance/20130316/news/ea_eab1.htm

香港情形也一样。 应该是富時STI指数比重改变的关系。

Penny sector gets new leader, STI stocks in heavy play
IT WAS an action-filled week for the local stock market - both for blue chips and penny stocks - as investors kept an eye on Wall Street, where the Dow Jones Industrial Average on Thursday had set seven consecutive all-time highs. Europe's problems were shelved for the time being, though local worries surrounding property curbs here and in China kept a lid on prices.
The Straits Times Index components yesterday were either heavily bought or sold - depending on the sector. Property stocks collapsed after the release of the latest developer sales figures but banks were propped up late in the session, thus cushioning the blow to the index. It eventually ended 6.55 points higher at 3,286.05, a loss of about three points for the week.
Perhaps more interesting was the fact that volume in STI components yesterday amounted to a massive 607 million units worth $1.7 billion, about three times the usual figure. Among the index stocks that recorded large volume were Wilmar International (down 5 cents to $3.32 with 55.3 million traded), CapitaLand (down 15 cents to $3.40 with 34 million done) and Olam International (down 5 cents to $1.62, 50 million done).
One index stock that rose yesterday was media and property group Singapore Press Holdings (SPH), the counter rising 3 cents to $4.52. It has been in focus after the company announced it is exploring the listing of a real estate investment trust (Reit). Most brokers responded positively, basing their calls on hopes of a special dividend if SPH was to list a Reit and SPH's limited downside because of its attractive dividend yield. For the week, SPH rose 35 cents or 8.4 per cent.
Over in the penny sector, former frontrunner WE Holdings' collapse from 18 cents the week before to just above 6 cents this week caught the eye. When queried by the Singapore Exchange (SGX), WE said it had no knowledge of reasons for the unusual activity in its shares other than the completion of placement exercises that had been announced last month, which have led it to appoint a new chairman.
Also to have a new chairman is WEH's replacement as the penny sector's leader, the newly-named SingHaiyi Group that was formerly SingXpress Land. The company is looking to raise more than $200 million for property development, mainly in the United States via a placement and rights issue at 1.5 cents per share.
After the placement is completed, SingHaiyi will have a new chairman - Neil Bush, brother of former US president George W Bush. SingHaiyi traded more than two billion units on Wednesday after the announcement, and did almost the same volume again on Thursday. However, it dipped 0.4 cent to 3.6 cents yesterday with 1.5 billion traded.
Other notable movements in the low-priced segment included a spectacular 8.5-cent or 17.5 per cent collapse yesterday in Rowsley Holdings to 40 cents on volume of 182.4 million, following talk that UOB Kay Hian has imposed trading curbs on the stock.
Also during the week, DBS Group Research released its Q2 Economics Markets Strategy. For Singapore, it said the economy is looking at a cyclical improvement as key manufacturing and services sectors look to be improving with better global economic conditions, but also faces a structural drag in the form of higher-than-average inflation and a strong Singapore dollar.
"Together, these two factors exerted tremendous pressure on margins," said DBS. For the US, it said it expects growth to remain below potential.
"Barring a relapse in the eurozone crisis, Asia's growth is gaining momentum, spearheaded by an improvement in China," said DBS. "Against such a backdrop, we continue to maintain our full-year GDP growth forecast (for Singapore) of 3.2 per cent. Growth momentum in the near-term will remain flattish but should pick up from the second quarter onwards."