In this video, I’ll provide more evidence that stock market analysts are useless, with help from Sarah Gordon at the Financial Times, who recently summarized today’s installments.
I call analysts “z-vals” for their 50% mistake rate. It’s a shorthand of the term “zero-validity environment” used by Daniel Kahneman in his book Thinking, Fast and Slow when discussing stock pickers and political scientists whose “failures reflect the basic unpredictability of the events that they try to forecast.”
A 2002 academic paper found that analysts merely follow glamour stocks.
[Paper abstract shown in the video, at 1:20.]
They’re just stock cheerleaders, with far more buy recommendations than sell. A waste of time.
In April 2013, the personal finance website Nerdwallet reported that 49% of analysts’ ratings on the 30 components of the Dow in 2012 were wrong. Have a look:
[Key findings shown in the video, at 2:39.]
Of course they’re better at identifying winners — the stock market rises twice as often as it falls!
If you have to guess, guess that a stock will rise because up is where the market usually goes.
A stock market analyst guessing a stock will rise and then bragging when it does is about as sophisticated as somebody guessing that the sun will rise and then jumping for joy when it does.
The strong odds of the market rising is why almost no analyst ratings are “sell.” In February 2015, Bespoke Investment Group put a finer point on it, as reported by CNBC. Take a look:
[Article excerpt shown in the video, at 4:45.]
In this round-up of evidence, we see analysts chasing the same glamour stocks everybody sees in the news, and almost never advising to sell.
This is completely unnecessary to you because you can already accomplish the results of this advice by just owning index funds, which go up with the market two thirds of the time.
Stick with a system of rational price reaction, the way I do. Analyst ratings are useless.
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