做多的一个优点是，call往往比put便宜 - 未名空间MITBBS历史存档

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做多的一个优点是，call往往比put便宜

做多的一个优点是，call往往比put便宜# Stock

t*a2011-04-20 07:04

1 楼

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Job Responsibilities:
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M*T2011-04-20 07:04

2 楼

实在没办法，因为被雷了很快就没保险了。所以安排了宝宝提前打2个月的疫苗，会不
会有后果啊？到时
候打2个月疫苗的时候，宝宝只有6个星期而已。提前2个星期打疫苗会不会造成严重后
果？很担心。
请问，这样的安排是不是最好避免？有类似经验的妈妈吗？谢谢

w*l2011-04-20 07:04

3 楼

如果用中长期的option,call的theta更小，对买家更有利。
call的价格比Put便宜，同样的钱可以买更多的call。

S*g2011-04-20 07:04

4 楼

Make sure your insurance will cover those shots
We wanted our son to take the 15-month shots before we left for China.
We were told that the insurance will not cover those shots if they are taken
ahead of schedule.

【在 M***T 的大作中提到】

: 实在没办法，因为被雷了很快就没保险了。所以安排了宝宝提前打2个月的疫苗，会不
: 会有后果啊？到时
: 候打2个月疫苗的时候，宝宝只有6个星期而已。提前2个星期打疫苗会不会造成严重后
: 果？很担心。
: 请问，这样的安排是不是最好避免？有类似经验的妈妈吗？谢谢

j*72011-04-20 07:04

5 楼

熊市里，靠扑都贵 (high VIX )。

【在 w****l 的大作中提到】

: 如果用中长期的option,call的theta更小，对买家更有利。
: call的价格比Put便宜，同样的钱可以买更多的call。

a*e2011-04-20 07:04

6 楼

我听说拖后没事儿，最好别提前。不过只是听说啊。这事儿还是慎重点。

【在 M***T 的大作中提到】

a*e2011-04-20 07:04

7 楼

who told you that....
normally put is cheaper.
theta is irrelevant here,
theta is about dynamics.
your average cost is static.

【在 w****l 的大作中提到】

: 如果用中长期的option,call的theta更小，对买家更有利。
: call的价格比Put便宜，同样的钱可以买更多的call。

s*y2011-04-20 07:04

8 楼

打疫苗好像很便宜的吧，我记得在医院看见过小册子，没保险也可以打，也不贵。

【在 M***T 的大作中提到】

f*n2011-04-20 07:04

9 楼

不对，性浪的CALL都贵很多。

【在 w****l 的大作中提到】

: 如果用中长期的option,call的theta更小，对买家更有利。
: call的价格比Put便宜，同样的钱可以买更多的call。

M*T2011-04-20 07:04

10 楼

thanks for your reminder.
i called the insurance just now, and was told that it is ok for the
insurance.
now, my only concern is if the earlier shot bring any bad effect...

taken

【在 S*********g 的大作中提到】

: Make sure your insurance will cover those shots
: We wanted our son to take the 15-month shots before we left for China.
: We were told that the insurance will not cover those shots if they are taken
: ahead of schedule.

j*72011-04-20 07:04

11 楼

因为大家都看好它。
在FDA event里面有时候（很少时候）会出现扑靠不均的现象，我们就可以上下其手了
。

【在 f********n 的大作中提到】

: 不对，性浪的CALL都贵很多。

c*r2011-04-20 07:04

12 楼

有些疫苗是很贵的，不过咱们都是保险公司付账，咱们不知道：）

【在 s********y 的大作中提到】

: 打疫苗好像很便宜的吧，我记得在医院看见过小册子，没保险也可以打，也不贵。

g*u2011-04-20 07:04

13 楼

Under the BS model, calls are priced higher than puts are, which is
essentially an artifact of the log normal assumption.
Real world trade prices are a whole different animal.

【在 w****l 的大作中提到】

: 如果用中长期的option,call的theta更小，对买家更有利。
: call的价格比Put便宜，同样的钱可以买更多的call。

S*g2011-04-20 07:04

14 楼

I don't think it is a big deal for only 2 week difference.
Anyway, you can discuss with your ped.

【在 M***T 的大作中提到】

: thanks for your reminder.
: i called the insurance just now, and was told that it is ok for the
: insurance.
: now, my only concern is if the earlier shot bring any bad effect...
:
: taken

j*b2011-04-20 07:04

15 楼

Puts are more expensive because the specific way that market index moves.
You see the pattern of segments of convex curves. This shape represents
peoples fear of risk. When there is any sign of risk, people tend to run,
causing the steep downward movement.
Any method of hedging the downward risk will be valued by investors, who
share the dislike of risk. Puts are a great way of hedging, and thus they
are expensive. Similarly, vix future, options are also expensive because
they can also be used as hedge against risk.

【在 g*****u 的大作中提到】

: Under the BS model, calls are priced higher than puts are, which is
: essentially an artifact of the log normal assumption.
: Real world trade prices are a whole different animal.

c*r2011-04-20 07:04

16 楼

好像。。。大多数2个月的疫苗6周是最早了。再早儿医不给你打：）
建议你直接看看cdc的网站，好像最早的疫苗都是6周可以打的。但是由于一般常规检查
在2个月所以都在2个月打。
6周之前，大多数疫苗都没有有效和安全的临床数据，一般不会给你打的。有钱也不让
你打。嗯

【在 M***T 的大作中提到】

a*e2011-04-20 07:04

17 楼

of course not,
if measured by IV, whether put or call is more expensive often is
a function of moneyness,
with BS model, IV for american call/put won't match for same strike.
it also depends on moneyness.
it's not an artifact of the log normal assumption.

【在 g*****u 的大作中提到】

: Under the BS model, calls are priced higher than puts are, which is
: essentially an artifact of the log normal assumption.
: Real world trade prices are a whole different animal.

a*02011-04-20 07:04

18 楼

把自己的情况和医生将，然后照着办

g*u2011-04-20 07:04

19 楼

LZ is clearly talking about "expensiveness" in absolute dollar terms. That
may have departed a little from a canonical interpretation of "expensiveness
" in an MFE classroom, nevertheless it is legit to our laymen. One can't
rebutt other's claim by making up his own and then shooting it down. Barking
up the wrong tree? LOL.
For what it's worth and for laughs, let's look at your definition.

===>Trivial fact. Parroting John Hull?
===>When speaking of IV, isn't BS model pressumed? Seems repetitive here.
===>I wasn't even attempting to tread the nitty gritty of real world option
pricing, as I duly recognize the lack of expertise in that regard.

【在 a*****e 的大作中提到】

: of course not,
: if measured by IV, whether put or call is more expensive often is
: a function of moneyness,
: with BS model, IV for american call/put won't match for same strike.
: it also depends on moneyness.
: it's not an artifact of the log normal assumption.