精 等于零的時候不是分散化最好么? 負相關(guān)也是相關(guān)呀 收益率什么時候最好呢?
精 C 為什么不對?
精 能不能總結(jié)一下long put, short put, long call, short call分別是什么
精 麻煩幫忙判斷第1點是否理解正確,以及解答第2點,謝謝:1、A:uses all members of each sub-group (strata).——是one stage cluster sampling 特有的。B:takes random samples all sub-groups (strata).——是straight sampling 特有的。2、C:will not preserve differences in a characteristic across sub-groups.——可以理解two stage cluster sampling 滿足,但straight sampling 是保留了各組之間的特點嗎?請解釋說明straight sampling 的過程
精 drawing simple random samples from each subpopulation in sizes proportional to the relative size of each subpopulation.這句話怎么翻譯?
精 老師您好,請問(1)binominallabelling是二項式的意思嗎?貼多個標(biāo)簽的英文的multinominallabelling嗎?(2)是否可以這樣理解:只涉及貼標(biāo)簽的就是combination和labelling,貼的標(biāo)簽涉及順序的就是permutation?
精 這邊算先付年金FV的時候, 為什么不可以把計算器調(diào)成后付年金模式, 然后N=2, I/Y=10, PMT=-200,PV=-200; 這樣的話不也是第0期200, 第1期和第2期是200的年金計算來算第3期的FV嗎?但算出來還是662.
精 這里的計算為什么用連續(xù)復(fù)利的公式,而不是用普通的公式?
精 老師 這里a選項中unbiased如何理解?
精 這道題,在用金融計算器時,I/Y為什么用名義利率除2來算,而不是按照實際利率EAR除2來算呢?之前不都是要換算成實際利率的嗎?
精 coupon越低,PVCF就越小,那久期就應(yīng)該越小吧?老師在視頻里講的 沒聽懂。
精 老師好,這個花圈的地方是怎么算出來的呢?謝謝
精 Module 1-Economics-書(2022-L1V1)P40-(1)第1段中的倒數(shù)第2句話,在考慮完$375 variable cost之后,為什么還要再貢獻$25的fixed cost? 什么叫“貢獻”,怎么理解?(2)還是這句話,既然字面意思是could earn revenue of $400, 為什么還會覆蓋 variable cost of €375 與€25 of fixed costs?這樣,不是收支平衡,即revenue=0 而不是400了嗎?(3)另外,前一句話:If it shuts down and earns zero revenue, then its variable cost would be zero but its losses would still equal the €325 of unavoidable fixed cost. -----> 這句話中,先考慮fixed cost,再考慮varible cost? 怎么區(qū)分fixed cost與variable cost的前后考量順序?
精 借債的增加導(dǎo)致WACC上升,是說明PV(財務(wù)困境成本)已經(jīng)超過借債帶來的稅盾的好處了。這句怎么理解,借貸的增加如何導(dǎo)致WACC上升。
精 Module 1-書(2022-L1V1)P22-Example 2-(1)Solution to 1,為什么要考慮For her birthday, a friend gave her a one-month club membership as a gift, and that month she saw 12 movies?為什么要拿這個條件下的12 movies與正常預(yù)算情況下可購買6 movies相比較?題干中說的是,In months that she does join the club, she sees eight movies. 而不是For her birthday, a friend gave her a one-month club membership as a gift, and that month she saw 12 movies. (2)Solution to 2,不太能理解,為什么the income effect of the price decrease has been removed by charging her the monthly fee?以及怎么結(jié)合后一句話一起理解?So the increase from six movies to eight is the result of the substitution effect.(3)Solution to 3, 因為movies不是必需品essentials, 所以判斷movies are not a Giffen good ? 另外,不太能理解Solution to 3的最后一句話,The substitution effect caused her to buy two more movies, and the income effect caused her to buy an additional four movies.請解析
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