In the wet and wild world of options trading, a vega value tells us how much an option’s price is likely to change based on the volatility of its underlying asset. The higher an option’s vega value is, the more its price is likely to jump or drop with every 1% change in volatility. And that’s really neat and all, but how do we tell how much the vega itself is likely to change? Well, that’s the job of something we call “vomma.” As an asset’s volatility changes, vomma measures the changes to vega.
So...why do we care? Well, let’s say we’ve got a positive vomma going on. If our underlying asset’s volatility increases, then vomma says vega will also increase. If that volatility decreases, then this same positive vomma says that vega will also decrease.
If it sounds a little confusing, think of it this way: a positive vomma just tells us that whatever direction the volatility is going in, the vega will also go. By contrast, a negative vomma tells us that the vega will do the opposite of what the volatility is doing. This can be really handy when we’re trying to choose our spreads, since we might be better able to tell how far in either direction the option’s price is likely to move.
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Finance: What Is a Put Option?83 Views
finance a la shmoop what is a put option? hot potato hot potato
ow ow! yeah remember that game well nobody wanted the potato, poor thing. the
players wanted to put it in someone else's hands. well put options kind [glue put around a flaming potato]
of work the same way. a put option is the right or option or choice to sell a
stock or a bond at a given price to someone by a certain end date.
all right example time. you bought netflix stock at the IPO a zillion years
ago at $1 a share. that's you know splits adjusted. all right now it's a hundred
bucks a share. if you sell it you pay taxes on a gain of 99 dollars a share. in
California that would be a tax of something like almost 40 bucks. well the
stock was a hundred but you keep only something like 60. feels totally unfair.
right so you really don't want to sell your stock but you're nervous about the [graph shown]
next few months that Netflix will crater for a while and go down ten
maybe twenty dollars. longer term though you think it'll hit 300. so this is the
perfect setup to maybe look at buying some put options on Netflix. if the stock
goes down your put options go up. with Netflix volatile but at a hundred bucks
a share ,you look up the price of an $80 strike price put option expiring in
December, and you know that's mid-september now .for five bucks a share
you can protect your stock for the next few months .think about it like temporary [stocks placed in vault]
term life insurance. you pay the five dollars a share in the stock goes down
to 82 by mid December, worst of all worlds. well not only did you lose the $5
a share but your stock has lost $18 in value. but had Netflix really cratered
and gone to say $60 a share well you would have exercised your put and sold
your shares at 80 bucks. well those put options you paid $5 for
would be been worth 15 bucks a share. in buying that put option you've [equation shown]
guaranteed that your loss will be no more than a $75 value for your Netflix
position at least for that time period and ignoring taxes. well remember that
options expire after December whatever like the third Friday of the month it's
usually when options expire, you then have no protection and your shares float
along naked. naked? really who knew accounting could get so [paper put option goes "skinny dipping".]
raunchy. yeah well that's naked put options.
that's what they really are people.
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