Everyone has one. Despite this, no one has yet developed a futures contract that would let you go short opinions.
Opinions are in definite oversupply.
Yet, despite this, this is the traditional season when magazines, especially financial magazines, all go opinion-mining, dealing up a lavish spread of forecasts, backcasts, pronouncements, denouncements, sagacity, senility, and sophistry. For some reason, still a mystery to me, many traders and investment managers are Randians or libertarians. I'm always impressed when people value freedom. And I value people who value freedom. But I suspect the chief freedom some of these people value is freedom from taxes.