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How much faith should you put in stock tips?

How much faith should you put in stock tips?

Stock tips are some of the most keenly-read – and fiercely debated – items in the financial media. But how much credence should you give them? And which tipsters should you trust?

It’s easy to understand why stock tips are so popular – they can translate directly and immediately into action that could make a difference to your near-term investment experience.

However, despite their obvious entertainment charm, stock tips like this probably don’t deserve the attention they get; certainly not in all cases.

The problem is the zero-sum nature of equity market outperformance. In many professions, an opinion from even a mediocre “expert” can be valuable. If you know nothing (for example) about dentistry, then advice from someone fresh out of dental school is probably going to be helpful.  Not so in equities.

Share prices are set by a market, and that means that the price settles at the point at which the weight of selling is balanced by the weight of buying.  In an orderly market, the share price represents the implied consensus between the sellers on one side and the buyers on the other. This means that for any given stock with reasonable liquidity, you will find plenty of investors on both sides of the buy/sell fence.

Taking a stock tip from a randomly-chosen expert then, is a bit like choosing a marble from a jar with roughly equal numbers of white and black marbles.  You can’t tell from that marble whether the jar contains more of one colour than the other.  This doesn’t mean you should ignore every stock tip that you hear, but it does mean some scepticism is on order.

To my mind there are a few ways you can extract value from stock tips. The main one is where you have reason to believe that the expert providing the tip has unusual skill.  A stock tip from an “average” expert is probably little more than random noise, but a thoughtful stock tip from a very good stock picker is likely to be more valuable.  Some of the questions you could consider are:

  • What is the long-term performance track record of this expert? Have they demonstrated an ability to deliver excess returns without taking excess risk?  If you don’t know the answer to this, or they don’t have a documented track record, then a grain of salt is probably in order.
  • How much conviction does the expert have? Sometimes experts are asked to respond to a question on a stock that they might not have studied in any detail.  Sometimes they are outlining a well-considered thesis for something they currently own.  The difference is important.
  • Does the expert have an insight that the rest of the market is unlikely to have? Often, stock recommendations are justified using facts that are well-known to others in the market. If these same facts are known to the investors on the other side of the trade, then they are likely factored into the share price already. Look for genuine insight rather than a recital of the last company announcement.

Ultimately, there’s no substitute for your own diligent research and evaluation, but it can be fun to hear the views of others, and sometimes those views can deliver genuine value. Just don’t fall into the trap of thinking that experts in the media always have gems of insight to offer.

Unless they’re dentists.

Tim joined Montgomery as Head of Research and Portfolio Manager of The Montgomery Fund in July 2012. Prior to this, Tim was an Executive Director in the corporate advisory division of Gresham Partners, where he worked for 17 years. Before joining Gresham Partners, Tim worked for McKinsey & Company for four years, where he was involved in strategic consulting in both Australia and Denmark.

This post was contributed by a representative of Montgomery Investment Management Pty Limited (AFSL No. 354564). The principal purpose of this post is to provide factual information and not provide financial product advice. Additionally, the information provided is not intended to provide any recommendation or opinion about any financial product. Any commentary and statements of opinion however may contain general advice only that is prepared without taking into account your personal objectives, financial circumstances or needs. Because of this, before acting on any of the information provided, you should always consider its appropriateness in light of your personal objectives, financial circumstances and needs and should consider seeking independent advice from a financial advisor if necessary before making any decisions. This post specifically excludes personal advice.


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  1. Yet another thoughtful article from you,Tim.Many Thanks
    Chris, some valid point you make there and thank you for that.

  2. Stock tips/expert advice is only useful if the rest of the market follow it. You could get caught if the market is singing from a different song sheet – which happens most of the time.

    The most accurate tips are given post the event ie in hindsight. This is where advisors can present a compelling argument.

  3. I wouldn’t put much faith in them, because if you knew (or had a decent idea) of what was going to go up (or down), why would you tell anyone before you had been an early mover on it, or at least put an order into the market to take advantage of it ? In fact, why would you tell anyone at all (or give them the right way to bet ?).

    I’m too cynical of full service brokers because the industry is geared around portfolio turnover and churn (which their whole tip structure is built around), rather than holding for the long term. If you bought and sold any other asset class (like property) in the same sort of time frame, people would think you were crazy.

    Furthermore, brokers are notorious for saying “Buy” when they mean “I’m selling and so are all of my ‘big end of town mates’ ”. The price movements in particular companies have the footprints of retail shareholders all over their backs because of this.

    Too often, brokers (and analysts) are also constrained by what they can say. You can’t be too bearish on a stock or an IPO (even if it is a dog), because if you are, you might just find that it is a severe career limiting move thanks to who knows who and who does business with, owns or sponsors particular companies and publications.

    Therefore, brokers are (at best) neutral in their outlook, so that they can’t get pulled up on the calls that they made wrong, and so they use terms like “lighten” (instead of “sell”) or “accumulate” (instead of “screaming buy”)….or the best one – “hold”, which means “do nothing because we don’t know either way”.

    And also, even the best get it wrong.

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