[心得] 股票市值,交易與零和
前幾頁討論的很熱鬧.
不少人說期貨才是零和, 股票不是.
以 成交價 來看, 個人認為股票 是 零和遊戲.
以 股價 來看, 個人認為股票 不是 零和遊戲.
例子:
A 有20000
B 有一張10元股票
錢共30000
case A: 股價
step 1: 股價漲到20元. (你可以說B憑空賺到10000)
step 2: 股價跌到10元. (你可以說B憑空虧了10000, 俗稱"市值蒸發")
case B: 成交價
step 1: 股價漲到20元,A向B買一張股票
(A有一張20元股票, B有20000, B這回真的賺到10000)
step 2: 股價跌到10元.
(A憑空虧了10000, 但是不就是回到原點嗎? 錢共30000)
分析:
case A:新聞會說一天跌了多少, 市值蒸發多少. 卻很少說市值憑空多了多少.
case B:只有成交才有真正的金錢流, 在此基礎上, 我認為股票是零和
淺見分享,歡迎大家討論.
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