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Quant版 - 求助:HEDGE FUND RETURN FORECAST
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1 (共1页)
l********e
发帖数: 349
1
在做一个HEDGE FUND ASSET ALLOCATION(STRATEGIC)的项目,看了些PAPER,但是对于
用什么方法做RETURN DISTRIBUTION的预测没有拿定主意。 有经验的能给说说吗?谢谢
t********a
发帖数: 810
2

so far 你看过哪些paper了?

【在 l********e 的大作中提到】
: 在做一个HEDGE FUND ASSET ALLOCATION(STRATEGIC)的项目,看了些PAPER,但是对于
: 用什么方法做RETURN DISTRIBUTION的预测没有拿定主意。 有经验的能给说说吗?谢谢
: 。

l********e
发帖数: 349
3
管事的PM都不是QUANT,他们想让我们看看FACTOR MODEL,所以我首先看的是这类的,
虽然我宁愿用DISTRIBUTION FITTING 去做, 因为我觉得即使REGRESSION R^2还可以,
也不可能准确预测每个FACTOR,两层的误差。
开始看的都是和FACTOR MODEL 相关的,比如Fung and Hsieh 的几篇HEDGE FUND PAPER
,还有其它人的一些类似的,因为我本身平时多数是看INTEREST RATE DERIVATIVE 相
关的MODEL,对于ECONOMETRIC MODEL 经验很少,所以看的过程中有看了些CITATION 很
高的经典PAPER,主要是看看方法和思路,比如 1993 fama_french_3-factor model,
Fama MacBeth 1973 什么的。
可是感觉FACTOR MODEL 都是用来ATTRIBUTION 或者说时候解释的,没看到多少用来预
测的。
所以想请教一下有经验的同学们都是咋做的。能给出几篇PAPER就最好了,先谢过了。
H********k
发帖数: 3950
4
这个需要很多很多包子
刚刚察看了下LZ的包子库。。。。
l********e
发帖数: 349
5
偶是穷人啊,唉。。。
c*********g
发帖数: 154
6
我只知道最简单直观的办法就是在线更新regression的结果,然后用更新后的参数做预
测。
l********e
发帖数: 349
7
偶是穷人啊,唉。。。
l********e
发帖数: 349
8
在线更新啥意思啊?不懂。比如我用历史月数据做FACTOR MODEL,假设我在月末,要预
测下个月的
return。模型中的FACTOR值除非是LAG,否则只能取预测值对吧?您是说这些预测值用
最新的
CONSENSUS?哪里找啊?不是都有的吧。

【在 c*********g 的大作中提到】
: 我只知道最简单直观的办法就是在线更新regression的结果,然后用更新后的参数做预
: 测。

c*********g
发帖数: 154
9
预测的话regression模型就要改成这样:
r(t)=beta0+beta1*factor1(t-1)+...+betan*factorn(t-1)
在时间t,用历史数据做regression,得到一组参数beta。然后将之作用于factor(t)
获得预测r(t+1)。
将factor(t)和真实r(t+1)加入历史数据以更新beta。
重复上述两步。。。
n**h
发帖数: 237
10
请问如何更新beta呢?如果仅以新值取代旧值怎样保证算出的beta在下一period还hold?

【在 c*********g 的大作中提到】
: 预测的话regression模型就要改成这样:
: r(t)=beta0+beta1*factor1(t-1)+...+betan*factorn(t-1)
: 在时间t,用历史数据做regression,得到一组参数beta。然后将之作用于factor(t)
: 获得预测r(t+1)。
: 将factor(t)和真实r(t+1)加入历史数据以更新beta。
: 重复上述两步。。。

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c*********g
发帖数: 154
11
没太看懂。更新的意思就是说beta要变啊,为什么还要保留旧的beta?
更新可以有多种方案啦,最简单的就是把所有历史数据都拿来做regression,这样训练
集就会越来越大。
或者每增一个最新的就干掉一个最老的,保持训练集大小不变。
再就是每个样本点加一个权值。这个权值可以随时间变化,越老的权值越小。或者可以
随样本的“好坏”程度变化,越像outlier的权值越小等等。

hold?

【在 n**h 的大作中提到】
: 请问如何更新beta呢?如果仅以新值取代旧值怎样保证算出的beta在下一period还hold?
l**********t
发帖数: 5754
12
in the hedge fund replication literature, beta is assumed to follow a random
walk so next period beta is current estimate + random shock with zero mean.
It assumes the holdings (thus beta) are not changed frequently (relative to
your sample frequency). It is reasonable for mid/low frequency strategies.
Take a look at the composition of hedge fund indices and you will be
surprised how many equity "hedge fund" are long only and buy&hold.

hold?

【在 n**h 的大作中提到】
: 请问如何更新beta呢?如果仅以新值取代旧值怎样保证算出的beta在下一period还hold?
l********e
发帖数: 349
13
能给篇PAPER的名字吗?谢谢!

random
mean.
(relative to
strategies.

【在 l**********t 的大作中提到】
: in the hedge fund replication literature, beta is assumed to follow a random
: walk so next period beta is current estimate + random shock with zero mean.
: It assumes the holdings (thus beta) are not changed frequently (relative to
: your sample frequency). It is reasonable for mid/low frequency strategies.
: Take a look at the composition of hedge fund indices and you will be
: surprised how many equity "hedge fund" are long only and buy&hold.
:
: hold?

t********a
发帖数: 810
14
又不是high freq trading, 搞什么fancy online update嘛.
l**********t
发帖数: 5754
15
http://www.amazon.com/Alternative-Strategies-Hedge-Replication-Finance/dp/047075446X/ref=sr_1_1?ie=UTF8&s=books&qid=1280888357&sr=8-1
this book is a good start and it has references to key papers.

【在 l********e 的大作中提到】
: 能给篇PAPER的名字吗?谢谢!
:
: random
: mean.
: (relative to
: strategies.

t********a
发帖数: 810
16
hedge fund return还能被forecast?
如果说fund of fund要推销一些产品需要呼悠我能理解, 真要那么牛能forecast hedge
fund return, 自己开个hedge, 根据自己对自己strategy return的forecast, long/
short自己的strategy好了.
and i dont feel most hedge fund strats are well understood. otherwise it is
too easy to make money against them. Many strats are similar though, but the
small different part can make a big impact on the overall performance.
l********e
发帖数: 349
17
Thanks a lot, littleshirt!

【在 l**********t 的大作中提到】
: http://www.amazon.com/Alternative-Strategies-Hedge-Replication-Finance/dp/047075446X/ref=sr_1_1?ie=UTF8&s=books&qid=1280888357&sr=8-1
: this book is a good start and it has references to key papers.

l********e
发帖数: 349
18
not easy to make a reasonable forecast, or might be just mission impossible.
Individual fund is totally unpredicable, however, you may do something about
the style index.

hedge
is
the

【在 t********a 的大作中提到】
: hedge fund return还能被forecast?
: 如果说fund of fund要推销一些产品需要呼悠我能理解, 真要那么牛能forecast hedge
: fund return, 自己开个hedge, 根据自己对自己strategy return的forecast, long/
: short自己的strategy好了.
: and i dont feel most hedge fund strats are well understood. otherwise it is
: too easy to make money against them. Many strats are similar though, but the
: small different part can make a big impact on the overall performance.

z****g
发帖数: 1978
19
For hedge fund, factor model makes sense.
For forecasting, you need to understand the source of their profit, which is
actually an important part in hedge due diligence.
Factor model based on investment style, asset, market, sector and currency
makes whole lot of sense. Academic papers focus more on the extreme behavior
of their returns, which directly contributes to the maximum drawdown. Hedge fund's
return distribution is highly asymmetric and skewed, hence portfolio allocation for
hedge fund
i*****r
发帖数: 1302
20
fund of funds的? 哎没前途。。
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