IRL. Abbreviation for In Real Life.. Often used in internet chat rooms to let people you are talking about something in the real world and not in the internet world. Also can be used to differentiate between an actor/actress and the character they play.
Put Call Parity Formula. The basic version of the Put Call Parity formula is; Call-Put = Stock-Strike. The formula supposes the existence of two portfolios that are of equal value at the expiration date of the options.The premise is that if the two portfolios have identical values at expiration then they must be worth the same value now.all-Put = Stock-Strike. The formula supposes the existence of two portfolios that are of equal value at the expiration date of the options. The premise is that if the two portfolios have identical values at expiration then they must be worth the same value now.
As an example, if you set: x=(1:100); y=exp(x); % then, corr(x,y,'type','Spearman'); % will equal 1, and corr(x,y,'type','Pearson'); % will be about equal to 0.25 This is because $y$ increases monotonically with $x$ so the Spearman correlation is perfect, but not linearly, so the Pearson correlation is imperfect. corr(x,log(y),'type','Pearson'); % ...