How to determine if options are cheap or expensive using historical data

Overtrading has nothing to do with bet size.You are confusing terminology.

Are you saying you could have delta hedged in the After hours post announcement and locked in a profit??
So it did gap,but you chose to let it ride and it reversed ??

No what I said was i could've closed the option positions and I could've broken even. Because of the mixed earning, the underlying first went up on the positive earnings and then went down on the negative revenue and after the meh guidance, it just went nowhere. So looking from hindsight, if I had closed my long call when it rode up and closed my long put when it went down, I could've broken even. But like you said, I would've had to adjust my "belief" that historical vol can predict or determine future IV which was what I believed in also at that time and I didn't so I held onto it and the next day got totally decimated by the volatility crush.
 
Gotcha,you never delta hedged in any manner,be it stock or selling options..

It's easy to judge in hindsight,but it's fair to say a 25 percent drawdown of assets is a bit much for a single position...of long vol no less

P.s. why don't you take a look at Orats??

No what I said was i could've closed the option positions and I could've broken even. Because of the mixed earning, the underlying first went up on the positive earnings and then went down on the negative revenue and after the meh guidance, it just went nowhere. So looking from hindsight, if I had closed my long call when it rode up and closed my long put when it went down, I could've broken even. But like you said, I would've had to adjust my "belief" that historical vol can predict or determine future IV which was what I believed in also at that time and I didn't so I held onto it and the next day got totally decimated by the volatility crush.
 
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Hi there,

just plain historical volatility data and its distribution gives you an idea of the underlyings future volatility.
However for the current implied volatility i doubt you can derive if an option is over-/undervalued... as i would consider them fair priced.
Implied volatility for a given strike, maturity takes into account much more than your data of just realized volatility has...
i.e. earnings dates, earnings uncertainty, overall current and expected market volatility (such as potential big movers, like cpi / fed), current company specific expected events, visibility and stuff...
they are called stochastic volatilty models.. fuckin look it up
 
No what I said was i could've closed the option positions and I could've broken even. Because of the mixed earning, the underlying first went up on the positive earnings and then went down on the negative revenue and after the meh guidance, it just went nowhere. So looking from hindsight, if I had closed my long call when it rode up and closed my long put when it went down, I could've broken even. But like you said, I would've had to adjust my "belief" that historical vol can predict or determine future IV which was what I believed in also at that time and I didn't so I held onto it and the next day got totally decimated by the volatility crush.
never happened to me.
i dont know why you guys do crazy shit.. we live in different universes
 
Gotcha,you never delta hedged in any manner,be it stock or selling options..

It's easy to judge in hindsight,but it's fair to say a 25 percent drawdown of assets is a bit much for a single position...of long vol no less

When I do earnings play, no cuz it's an inherent delta hedge to each other but I should've done is do a bit of volatility hedge I guess so in a situation where the volatility is less than expected which is what I was in, I won't lose that much. But when I do directional, I do delta-hedge but it's the other way around. I do the directional bet with the underlying and hedge with the options so I get bigger bang for the buck with the underlying since it's got delta of 1 and then hedge with option so the cost is cheaper. And if I am wrong with on the underlying, hopefully the infinite gamma on the option will kick in and my loss will be covered and sometimes even turn it into a profit. I consider the hedging option as the wingman to my underlying. LOL

P.s. why don't you take a look at Orats??

I did. It's similar to the analysis that I did before I decided to bet the house on that fateful earnings play but Orats' analysis is lot more extensive and detailed. I am impressed. :) Maybe if I used that analysis, I might have arrived at the conclusion, MIGHT HAVE that that earnings play was too expensive because I remember that combo's price was really high because the historical IV on the earnings NFLX had been very high for the 2 years prior so maybe the combo price being too expensive might have at least made me not bet that much.

But having said that, the model still would not have predicted how the future volatility would be based on historical volatility. In other words, the model would've still underestimated the future volatility causing you to undertrade if future volatility turned out to be even higher and overestimated future volatility causing you to overtrade if the future volatility turned out to be lower. Everything is too expensive or too cheap only from hindsight, unfortunately.
 
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Ill be the first to admit I did some really dumb shit when I started out..Mercifully,it was OPM

Ah I am sure they didn't mind losing a bit of their money cuz u smooth, General Tao, u smooth...:D
 
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OMG!!!! Exactly the stock that made me lose 25% of my trading capital and you had to pick it to do the analysis. LOL Did an earning play on it few years back. It was making 20% moves during every single earning season for the past like 2 years before so I thought I put in my bet because all of the historical IV pointed to huge earning moves. Did a gut spread too. Lost almost everything on it. As luck would have it, it had a mixed earning that time. For the past two years, every single earning, it was either bad or good with really big directional moves but on that earning that I decided to put in my bet, it had to have a mixed earning. LOL It had good earnings but the revenue was a miss and the guidance was just meh so the stock went up and then went down during AH but I decided to hold it until the next day to see if I can get my 20% like the past 2 years, got totally annihilated by the volatility crush. The stock barely moved like 2% the next day. 25% of my trading capital gone, in one day!!

From that time on, I realized historical and current IV doesn't mean a thing. I mean yeah if I had done a more OTM strangle or longed some kind of back ratio condor, I might have lost less but it would've still been a loss.

Infinite gamma was not happening on that day. It only happens when I am shorting options. LOL
Didn't mean to pull up bad memories, but all of us can learn from each other's mistakes.
Here's our blog on NFLX trade: https://blog.orats.com/netflix-nflx-earnings-report-thursday-january-19th
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