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 Apr 2 comment Few questions on Binomial-Lattice Option Valuation I think you are wrong in your first paragraph. Starting page 8, there's a good explanation about Binomial Lattice Option Valuation on this link slb.com/~/media/Files/resources/oilfield_review/ors03/win03/… Apr 2 revised Few questions on Binomial-Lattice Option Valuation added edit 2 as an additional question; added 10 characters in body Apr 2 comment Few questions on Binomial-Lattice Option Valuation If the binomial lattice is giving me option PV's, and my PV's are supposed to decrease with time, then why does half of values in my terminal nodes show an increase in values than what I start with (=S0). I have attached a snapshot of the values in the question. Apr 1 comment Risk neutral probability in binomial lattice option coming greater than 1…what's wrong? The first condition doesn't do any good either. Usually u~[1.001,1.5], and as I said in comment to quant_dev that by putting nColumn=1000, which gives del_T=0.02, then you can calculate that your given condition is satisfied, however the p is still greater than 1. Apr 1 comment better estimator of volatility for small samples webs1.uidaho.edu/geoe428/files/GeostatSec7.pdf: You dont need to read all of it. Just get the idea of making a cut-off limit and using binary numbers 0 and 1 to populate your distribution. This way you can subdue the effect of outliers. Mar 31 revised better estimator of volatility for small samples added 112 characters in body Mar 31 answered better estimator of volatility for small samples Mar 30 comment Risk neutral probability in binomial lattice option coming greater than 1…what's wrong? Here's the wikipedia article: en.wikipedia.org/wiki/Binomial_options_pricing_model Mar 29 revised Few questions on Binomial-Lattice Option Valuation added matlab code of binomial lattice Mar 29 asked Few questions on Binomial-Lattice Option Valuation Mar 29 comment Risk neutral probability in binomial lattice option coming greater than 1…what's wrong? It doesn't. Even if I make nColumn=1000 and T=20, still p=4.1291. Mar 29 asked Risk neutral probability in binomial lattice option coming greater than 1…what's wrong? Feb 18 awarded Quorum Feb 8 comment Deterministic interpretation of stochastic differential equation @richardh: And moreover I never said he could solve SDE by discretizing it. I specifically gave him the link to show the final formula which is an implicit equation, and can only be solved by Finite Difference. Feb 8 comment Deterministic interpretation of stochastic differential equation @richardh: I didn't presume that what he's showing is not correct. I gave my answer based on his equation. Moreover, what I said is a differential term with power 1/2 is indeed the same. That term comes from Wiener process' formula. I gave answer based on his equation. And to be fair, I doubt your answer's correctness in starting, however I don't have time to look up that and then downvote the answer with the courage of not giving reason. Once again, my answer was based on his equation and not on standard GBM equation. Feb 8 awarded Critic Feb 8 awarded Commentator Feb 8 comment Deterministic interpretation of stochastic differential equation Whoever downvoted, write comment for that. Feb 8 comment What is the difference between volatility and variance? I think variance is called quadratic measure, or double moment, not volatility. Feb 8 answered What is the difference between volatility and variance?