What's the implied Volatility?

If I use theoretical prices under a normal valuation model, and I estimate their implied volatility using BLACK SCHOLES implied volatility, do I'll get corresponding log normal volatility?

Hi, Does anyone know where I can get free timeseries data for stock options (i.e. for puts and calls the optons strikes, prices, expiries etc). I need this as I want to calculate a stocks implied volatility over time. Or even better does anyone know...

Hi all, Does anybody know how to find the option-implied volatility of a company? I can get it from Bloomberg, but is there a public service(e.g. Yahoo Finance, etc.) that can give me such information? Let's take GM as an example, it has some 24months...

LiveVolPro allows one to analyse a stock's implied vs. historical volatility.  Any similar tools out there for outside US?

Will a decrease in VIX cause a corresponding reduction in premium of the option due to a decrease in implied volatility?

I'm trying to compare risk across a set of options purchases to identify which was the most risky bet. They are all out of the money options, from different stocks, with different expirations, and different strikes purchased in different time periods...

What is the intuition behind the dependence of volatility and option price?

what is the implied value of the mexican peso in terms of the euro

I guess my real question is: how is historical volatility useful in combination with implied volatility? I realize that implied volatility is important in determining whether or not options are over-priced or under-priced. When I calculate the implied...