== 補充 == 老美:開盤價的決定 How is the opening stock price determined https://www.investopedia.com/terms/o/openingprice.asp https://www.investopedia.com/articles/investing/080713/opening-cross-how-nasdaq-stock-prices-are-set.asp
How Does the Stock Price Change When a Dividend Is Paid? https://finance.zacks.com/stock-price-change-dividend-paid-3571.html
台灣除了有漲跌限制 開盤競價的機制 大致也是如老美 the equilibrium price is where the maximum volume is executable