By Alex Gurvich, portfolio manager at The Rockledge GroupNEW YORK ( TheStreet) -- I spoke at a conference recently, presenting my ideas about generating alpha. As I spoke, some folks were nodding their heads in agreement, some were doing their BlackBerry prayer and some were simply not present. Typically that's how it would end: some exchange of ideas, a nice conversation, but no more. But I had more to say. I started talking about volatility and how it affects the generation of alpha. The effect, unintentionally, was amazing: The heads went up, the BlackBerrys went down and the room became focused. It was as if everyone had been given an intravenous injection of 5-hour Energy. So what is it about volatility? The standard textbook definition I teach to my finance students when I am not managing client portfolios is that volatility (or standard deviation) is the square root of variance, which is the sum of squared deviations of stock returns from its mean. Now if that is not a mouthful, I don't know what is. It is certainly not this definition that makes people pay attention. A more common definition of volatility is the riskiness of a security. There is something about volatility that simply gets everyone's attention. Although I wish I could take credit for the reaction I got at the conference, it was the mention of volatility that generated the excitement. Volatility typically brings out gut reaction and gets everyone excited. It is like a roller-coaster, exciting and scary and the same time. The higher the volatility, the stronger our reaction up and down. It is well documented that current volatility is considered low. The chart below shows the level of the S&P 500 index on the left scale and the rolling 12 months of volatility on the right scale.