From the article, quote of a quote:

Investors who followed the advice of analysts who say when to buy and sell shares of brokerage firms and banks lost 17 percent in the past year, twice the decline of the Standard & Poor's 500 Index.

This is true for political punditry and other talking heads that appear on news and current affairs show. We can say with certainty that mass media is devoluted into entertainment, and no longer provides news, consequently the self-styled and proclaimed specialists are entertainers; not specialists.
Cam Riley: South Sea Republic. Freedom, liberty, equity and an Australian Republic.