請問為什么成長股的pe高 價(jià)值股的pe低?從數(shù)學(xué)角度來看這個(gè)怎么解釋?
Optimization和smart beta的區(qū)別是不是前者是pure indexing后者是enhanced indexing?
Security lending會不會有違約風(fēng)險(xiǎn) 比如股價(jià)暴漲 short party還不起了 畢竟這個(gè)又沒有initial margin的
@KAIKAI 接這個(gè)問題 你說比如現(xiàn)在已知股票10塊,發(fā)了利好大家預(yù)期它要漲到20,那么是不是大家覺得這個(gè)股票現(xiàn)在很便宜,都想去買,那么買入需求就上升了。所以利好消息會促使大家去買股票。 大家去買股票是覺得它被低估了,以后會漲 而它以后之所以會漲又是因?yàn)榇蠹胰ベI股票 這就像一條蛇咬住了自己的尾巴 用結(jié)果推原因。 它的實(shí)質(zhì)與利好消息完全沒有關(guān)系。 換句話說 如果幾家機(jī)構(gòu)重倉買股票 那不管什么利好利空 它都得漲。反正 再利好的消息,如果股民手里沒錢 不買。再怎么都不會漲。 所以我沒看出來利好消息與股價(jià)變動(dòng)有什么直接聯(lián)系。直接聯(lián)系的就是你說交易所里面交易的order book 是根據(jù)供需決定價(jià)格的
為什么weighting下降,要賣出,weighting不是更低了嗎
Reading 18, 課件中,Determining the appropriate level of risk中,有這么一句“constraints on short positions or on leverage may limit the manager's ability to under/overweight, thus the information ratio my degrade if active risk increases beyond a specific level", 老師,我想問一下,為什么在leverage,和short positions有限制就有會影響manager's ability to under/overweight?
答案里解釋,skill的最好度量是 tracking error;tracking error 越低,說明skill 越好?
精 為什么要選擇covariance高的?不利于分散化把?
二級在分解超額收益時(shí)選股收益時(shí),認(rèn)為alpha是真實(shí)收益和期望收益的差異; security selection收益為組合殘差和基準(zhǔn)殘差的差異(圖二)。n三級后,選股差異來源為alpha+殘差(圖一)。請問如何理解? nn謝謝。
long-short 策略的總敞口可以大于100%,題目選項(xiàng)中只是說達(dá)到100%,這句話其實(shí)不對呀
L3V3 P363. How can I tell from the Exhibit that the custom portfolio satisfies " no position greater than 2%" ?
精 L3V3 P362, why does a negative coefficient on the Size factor indicate a large-cap bias?
L3V3. Compared to Equation 2 and Equation 6, does that indicate alpha in Equation 2 is a constant?
In previous exams, we call alpha the excess return. But now in L3V3 P308, we call alpha the active return from the skills and management from the portfolio manager. Which one should I follow? And how should I differentiate total active return from the active return solely from portfolio manager?
(1) Will there be any security that is not in the benchmark but get included in the portfolio? (2) If yes, what is this return called? (3) Why active return does not include such a return?
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