The theme song for the exchange-traded fund industry could very well be Frank Sinatra’s "It Was a Very Good Year," as the industry hit $1.25 trillion annually in assets through November, faster than any other time in history. "I think, largely speaking, you look across the different asset classes – stocks, bonds, commodities, gold, of course – it's been a very good year to own assets. Assets largely across the board have outperformed cash. So, it's just been a positive returning environment for assets. So, ...