c*******t 发帖数: 123 | 1 我也是小白。我今天才看了john hull interest swap这一章。 说一点我的看法:
interest rate swap can be recognized as a linear combination of two bonds,
one is long, and another is short.
so the total duration of the bond portfolio and the interest rate swap is
nothing more than the linear combination of three bonds.
When you caculate the weight factor of bond duration you use the present
value of the bond, i.e the market price,
so it make sense to use the market price of the interest swap as the weight
factor, which is jus... 阅读全帖 |
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r******l 发帖数: 10760 | 2 申根签证的Duration of Visit的定义跟绝大多数人的直观理解都不一样,但是奇怪的
是似乎所有申根国使领馆的网站上都没有对此作出官方解释。虽然网上很多网友做出过
解释,但是似乎从来没见谁给出过官方link。据说“没有link就是胡说”。今天终于见
到网友Shirley给了一个官方link(http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=CELEX:32009R0810:EN:NOT),总算正式证实之前的“胡说”都是对的了。
下面我就来详细解释一下这个奇怪的Duration of Visit的定义,以免后来人理解错误
。比如我们有一张多次的申根签证,有效期是From 01-01-12 To 31-12-12,Duration
of Visit是90天。那么按照常规理解,下面几个问题的答案应该是什么呢?
1.如果我12月1日进入,能呆多少天?
一般人可能认为既然Duration of Visit是90天,自然可以呆90天了。错!只能呆到签
证有效期的最后一天,也就是12月31日。
2.如果我1月1日进入,呆了60天。然后... 阅读全帖 |
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r******l 发帖数: 10760 | 3 申根签证的Duration of Visit的定义跟绝大多数人的直观理解都不一样,但是奇怪的
是似乎所有申根国使领馆的网站上都没有对此作出官方解释。虽然网上很多网友做出过
解释,但是似乎从来没见谁给出过官方link。据说“没有link就是胡说”。今天终于见
到网友Shirley给了一个官方link(http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=CELEX:32009R0810:EN:NOT),总算正式证实之前的“胡说”都是对的了。
下面我就来详细解释一下这个奇怪的Duration of Visit的定义,以免后来人理解错误
。比如我们有一张多次的申根签证,有效期是From 01-01-12 To 31-12-12,Duration
of Visit是90天。那么按照常规理解,下面几个问题的答案应该是什么呢?
1.如果我12月1日进入,能呆多少天?
一般人可能认为既然Duration of Visit是90天,自然可以呆90天了。错!只能呆到签
证有效期的最后一天,也就是12月31日。
2.如果我1月1日进入,呆了60天。然后... 阅读全帖 |
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n*****r 发帖数: 159 | 4 Duration, by its name, is the averaged-time to get cash back.
for Bullet bonds, Modified duration can gauge the relation between bond
price change and yield change. and in this case ONLY, Duration is the first
term in Taylor expansion of P(y). the second term is convexity.
But for bonds with embedded options (callable corporate bond, mortgages, ABS
), the relation between Duration and bond price breaks down. And people
often use effective duration.
really
particular |
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a***r 发帖数: 594 | 5 let me try again.
you said in your original post that you know: price, yield and you need
duration. from your later post, you indeed need dollar duration which is
price change per unit yield change.
so ask yourself, if yield is 0 what is the price of your product? call it P0
. then (P0-P)/yield is an approx for duration.
for a bond, the price is par if yield is 0. that s why (price - par)/yield
is duration. note you need the clean price, stripped the accrued coupon.
if you have a portfolio, you ... 阅读全帖 |
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w********0 发帖数: 1211 | 6 一道电话面试题。先问什么是duration, 我说了一下duration的定义,另外它也等于所
有payment date的一个weighted average。然后问10年的treasury note的duration大
概是多少,我说那得取决于coupon rate是多少,如果是zero-coupon,那当然是10年,
但通常10年note都是有coupon的,所以duration肯定比10年短,他就让我给个大概的估
计,我重复说那得给我coupon rate才能估啊,他说coupon rate就是我要问你的。
然后我就歇菜了,如果他问的是今天的coupon rate, 我的确不知道,但感觉他是问泛
指的某个10年note怎么估duration或者怎么估coupon,我只能说这个coupon rate和
Libor有关。他说不对。
我可能没理解题目。 |
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b***k 发帖数: 2673 | 7 ☆─────────────────────────────────────☆
xvgsfx (pains) 于 (Mon Jun 30 05:57:53 2008) 提到:
according to Bassel 1, there are 2 standard methods to compute capital
charge; maturtiy method, duration method.
i have one question about the second method
债券的DURATION 如何算? 比如FIXED COUPON BOND
5年的,每年5%,每年末PAY 一次, 那么如何计算这这个BOND的DURATION?
对于DURATION 除了导数的概念,我没有其它的想法了. 想知道算那个时刻的导数(因为
实际中用差分代替导数); 1,2,3,4,5年末,到底是哪个时刻的导数?
MANY THANKS
☆─────────────────────────────────────☆
Jowie (平稳的心态...) 于 (Mon Jun |
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J*****n 发帖数: 4859 | 8
duration
it.
really
or
coupon.
因为floating rate没有所谓的YTM的概念,所以要算他的dollar duration,不能通过
fixed rate的duration公式去算,正确的做法是把floating分解为即将到期的fixed
rate和一系列的价值为0的forward contracts,然后可以通过公式算他的fixed part的
DV01,所得即为floating rate note的duration。 |
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t********t 发帖数: 1264 | 9 This is totally wrong. Only with the final principal paying back, the
duration of the floating arm can be almost zero. Because with the principal,
the floating arm can be treated as a money market account with current
value = principal.
And with the final principal added to the fixed arm, the duration of the
fixed side equal to the duration of the coupon bond.
发信人: sirlord (sirlord), 信区: Quant
标 题: Re: A question on swap duration - thanks for help!
发信站: BBS 未名空间站 (Wed Jun 3 20:42:26 2009)
NO!
Du |
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D******6 发帖数: 6211 | 10 请教使用Stata duration analysis的问题,特别是multiple spell的,我简直找不到
合适的例题可以参考,stata的help太简单了。
我现在有个multiple spell的duration dataset,按照stata 网上FAQ的解释,先应该
转换成survival dataset,但是FAQ里讲的
http://www.stata.com/support/faqs/stat/stspell.html,
和Stata的技术支持回复我的email讲的不是很一致。Use是一个使用是否某种产品的
binary变量。
比如我的duration dataset如下,我想把它转换成survival dataset好用stset。
如果我的duration数据如下:
ID, begin time, end time, use
101,4,5,1
101,5,10,0
101,10,17,1
101,17,23,0
102, 1,15,1
102, 15,16,0
102,16,23,1
那么,转换之后的survival data是下面这样吗?
ID, begin |
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c****e 发帖数: 37 | 11 3. "NUMBER OF ENTRIES" heading:
This heading shows the number of times the visa holder may enter the
territory for which the visa is valid, i.e. it refers to the number of
periods of stay which may be spread over the entire period of validity, see
4.
The number of entries may be one, two or more. This number is written to the
right-hand side of the preprinted part, using "01", "02" or the
abbreviation "MULT", where the visa authorises more than two entries.
When a multiple airport transit visa i... 阅读全帖 |
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s*****d 发帖数: 114 | 12 for a plain vanilla swap, the duration for fixed-receiver is calculated to
be duration of fixed rate bond minus a very small number (reflecting the duration
from the floater b/w resets). this is well understood and I am fine with it.
the question is: if you model the cash flows of two arms, there is NO
principal exchange at maturity for either arm, this means instead of
modeling the swap as long fixed rate bond and short floating bond, it really
should be long fixed rate annuity and short floati |
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c**********e 发帖数: 2007 | 13 JunkFood,
我觉得你老板的问题其实是这样的。假设我手头持有一些十年期国库券期货。
如果我只是打开了finance.yahoo.com,或者是在走廊里看见,或者在电话里
听见今天十年期国债利率长了3.7个BP,我就知道大约亏了多少钱。怎么算?
其实在此之前,我知道我的仓位的的大致 dollar duration。这个 dollar
duration怎么来的?你通过昨天的 PNL 除以昨天的 BP 变化就行了。有经验
的 trader 知道自己的仓位的的大致 dollar duration。我觉得你老板侧重的
就是这种估计。当然你可以用公式算一下理论值。 |
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Y******u 发帖数: 1912 | 14 问一下大家key rate duration的standard是shock par curve还是shock zero curve?
bloomberg做法是shock par curve,但这样在重新bootstrap zero curve和
interpolate的时候会有可能降低adjecent spot rates,如果正好有cashflow在那里,
就可能得出negative key rate duration,有点counter-intuitive
我们之前的做法是直接shock zero curve,比如key rate tenor 1,2,5,10 years, 要
shock 2 year的时候把1-5 years中间的spot rate全部shock,shock size根据每个点
到2 year的距离,这样的结果是guarantee positive,sum也等于duration
不知道业界标准是怎么做? |
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Y******u 发帖数: 1912 | 15 问一下大家key rate duration的standard是shock par curve还是shock zero curve?
bloomberg做法是shock par curve,但这样在重新bootstrap zero curve和
interpolate的时候会有可能降低adjecent spot rates,如果正好有cashflow在那里,
就可能得出negative key rate duration,有点counter-intuitive
我们之前的做法是直接shock zero curve,比如key rate tenor 1,2,5,10 years, 要
shock 2 year的时候把1-5 years中间的spot rate全部shock,shock size根据每个点
到2 year的距离,这样的结果是guarantee positive,sum也等于duration
不知道业界标准是怎么做? |
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b*****l 发帖数: 85 | 16 请问如果一个 fixed income 的 portfolio 含有一个一般的 bond的portfolio 和 一
个interest swap的portfolio。 已知 bond portfolio 的 market value and
duration, interest swap portfolio 的 market value,notional value和duration
也已知,这种情况怎么算 weighted average of total portfolio 的 duration? 对
于interest swap,如果也用market value 好像underestimate interest swap的
exposure。有人说用market value+notional value,直觉上觉得说不通,这样不就
double count 了吗?但那个说的人很firm,好像是industry standard一样。有人能给
讲讲吗? 先谢谢了! |
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B***E 发帖数: 2001 | 17 【 以下文字转载自 JobHunting 讨论区 】
发信人: BLADE (重剑无锋,大巧不工), 信区: JobHunting
标 题: Valid for duration of status是什么意思
发信站: BBS 未名空间站 (Thu Oct 8 13:41:18 2009, 美东)
收到的I-539 approval notice 上的
valid from: xx/ xx / 2009
valid for duration of status
从H1转到F1的I 539, F1是挂在语言学校的 |
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S*i 发帖数: 784 | 19 我还要去法国,实际呆的天数要超过22天,差不多27天,可以在法国办延期么?
我没想到只给了22天duration, 以前申请最短duration都给30天的。。 |
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j*****o 发帖数: 6 | 21 We say that duration is bond price sensitivity to interest rate. But really
which interest rate? Does a change in any point within the entire yield
curve (i.e. any interest rate change) will affect the price of a particular
bond? or only rates with shorter terms than the bond maturity matters?
If we express bond price as P(r), then this "r" seems to be the internal
rate of return, and the duration is just the first order Taylor expansion
for P(r) around this "r". So the interest rate affects th |
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D*******a 发帖数: 3688 | 22 swap不能用annuity来replicate。
annuity的cash flow跟bond不同,因为每次payment里面包括principle和interest
越到后面,interest越小,对duration的贡献就越小。
duration
it.
really
or
coupon. |
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s*****d 发帖数: 114 | 23 NO!
Dur(Principal change at t = T) are NOT the same for fixed and floating legs
for a floater, duration is close to zero with or without a final principal
pay back; whereas for the fixed rate bond duration will be much shorter
without a final principal payment at maturity. They do NOT cancel out.
legs |
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J******d 发帖数: 506 | 24 SwingLH, 谢谢你详细回复。
但是,我觉得你似乎把我问题的方向给搞错了。我要duration是因为我想知道一个
20bps move我的
position的价格会变多少。你的建议似乎是如果我知道价格变动多少我可以反推出
duration是多少。
按照你option的例子,我们需要知道delta是多少是因为我们想知道call会变动多少。
我们要是已经
知道call会变动$0.4的话,没人会在乎delta的。 |
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c****y 发帖数: 3592 | 25 通常duration是负的,就是interest rate 上升,IO价格上升,但是为什么到了末期IO
价格会下降duration变正? |
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g*******g 发帖数: 59 | 26 有种duration 叫spread duration |
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B***E 发帖数: 2001 | 27 收到的I-539 approval notice 上的
valid from: xx/ xx / 2009
valid for duration of status
从H1转到F1的I 539, F1是挂在语言学校的 |
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y*****6 发帖数: 414 | 28 问下买股的duration里选择good until canceled,如果交易两天才完成,是不是要收
两笔comission fee?从没选过这个,问下用过的朋友,多谢了 |
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i***y 发帖数: 285 | 29 My Mom stay here for 183 days, Can she count for my dependent? What is the
shortest duration for her to be a dependent of mine?
I heard that if I add her as dependent, i can have $13,000 tax deduction. Is
that true? |
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z****l 发帖数: 5282 | 30
What is the shortest duration?
yes if you can file as resident.
183. Kindly read the chapter 1 of publicaiton 519 on www.isr.gov
Is
ask whoever told you so. |
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W*********n 发帖数: 775 | 31 觉得非常奇怪,为什么有一段日子的unemployment在OPT期间,结果"Duration of
Employment"那一栏还是写着第一年OPT的有效时间还是EAD卡上的整个一年的时间。这
就说明在I-20表上根本看不出你的unemployment information.
谢谢! |
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m*****b 发帖数: 267 | 33 如果申根签证validity是4月1日到4月30日,duration是15天。
如果4月25日入境,在申根国可以待5天还是15天? |
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S*i 发帖数: 784 | 34 第一次在法国签 也给的是3个月内30天duration multi entry....... |
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y*****g 发帖数: 677 | 39 有多个途径实现,看你的精度要求。
1. 用 profiling,
mysql> set profiling=1;
Query OK, 0 rows affected (0.00 sec)
mysql> SELECT whatstheweatherlike(3);
+-----------------------------------------------------------+
| whatstheweatherlike(3) |
+-----------------------------------------------------------+
| Its 3°C, time is 02:43:25, feels [like] snow is melting |
+-----------------------------------------------------------+
1 row in set (0.00 sec)
mysql> show profiles;
+-----... 阅读全帖 |
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k***r 发帖数: 4260 | 40 谢谢,我知道ffmpeg,忘记也是个library了。找到一个pyffmeg
package,回头试一下。Do you happen to know what the function
is called to get video duration? If not, it's OK. |
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s******0 发帖数: 1269 | 41 最近在突击FM,对于duration和immunization不知道怎么复习好一点,看上去
immunization好像全是数学推导阿,这个在fm里面会怎么考呢?
希望考过的人指导一下! |
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a*****r 发帖数: 1539 | 42 Usually ppl consider bond price sensitivity to 10year rates. For different
points on the yield curve, you can caluculate partial duration for each
point.
really
particular |
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m*****n 发帖数: 3575 | 43 我靠,是对利率的导数,不是对年份时间的导数,非要说哪个时候的导数,就是在现在
对利率的导数。就是要算隔了一夜早上起来看新闻利率突变了几个基点,立刻用
duration条件反射的说出该债券价格会变百分之多少。而这里时间基本视为不变,而利
率是突变的。感觉lz没学好偏微分,只需对利率求偏导,而时间根本保持不变。 |
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i**********o 发帖数: 5993 | 44 legs
THEY ARE THE SAME
WITH FINAL PRINCIPAL, DUR IS NOT 0
whereas for the fixed rate bond duration will be much shorter |
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n******r 发帖数: 4 | 45 My understanding is duration is additive per (CF, time) component.
Why would Dur(principal@T) be any different whether it's counted as part of
the fixed arm or floating arm?
legs |
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J******d 发帖数: 506 | 46 如题。
知道price知道yield知道maturity, 如何快速心算duration (convexity)?
老板最近老是猛的问我这些。请赐教! |
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a***r 发帖数: 594 | 47 quick and dirty
dollar duration = DV01 = (clean price - par)/yield. |
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w******i 发帖数: 503 | 48
sounds like you are trader. don't you have quants to work
out the durations for you? |
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z****u 发帖数: 185 | 49 Ignore coupon payment in the bond price definition in terms of yield, you
can
see
duration ~ maturity
so in your example, PnL moves 10*0.002=2% of the total value.
不是做这个的,错了轻拍. |
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T*******t 发帖数: 9274 | 50 还是要根据当前rate 毛姑姑一下
现在这个情况,duration放个8年吧 |
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