Aaron Brown Wins Silver Bullet: Why Context is Needed In Reading Charts

Published 08/10/2017, 12:54 AM

Aaron Brown recently wrote a careful analysis of some popular charts that lacked the needed context. As often happens, his excellent work received some attention, but probably not as much as the original post. He deserves more recognition. That is the purpose of the Silver Bullet Award.

For several years I have highlighted work that represents strong, factual analysis and is not influenced by popularity or page views. One must be like the “Lone Ranger” so I called it the Silver Bullet. Trying to get more recognition for these first-rate posts, I am now highlighting them in a new and separate series (rather than inclusion in my regular weekly updates). I hope that readers and past winners will join me in highlighting this important work.

This Week’s Award – Aaron Brown

One of the most popular market topics is crash risk. The idea that stocks are fully valued and upside is limited seems to be a required part of any current commentary. More and more popular work claims that a crash may be imminent.

Real S&P Index

Graphics have a tremendous power on readers, regardless of the actual relevance. Context is required. Enter Aaron Brown!

In a carefully nuanced response he looks at longer-term results. He also objects to the time for the ending of each chart. He shows the dramatic change of extending it a bit. To appreciate his work, you need to read the entire post – and I hope you will! Meanwhile, here is an example.

2010-2017

Brown summarizes, in part, as follows:

For those inclined to see patterns, the takeaway is that it’s not really the slow-build-up-sudden-crash suggested by the original charts. Rather there are periods of general uptrends, which tend to have relatively low volatility around the smooth orange line, interspersed with level or down periods, with much more volatility both up and down. I’ve never tested that rigorously, but it doesn’t strike me as a bad qualitative description.

He also does a careful analysis of comparative drawdowns – a key element in evaluating risk and reward. There is an excellent and helpful table.

Takeaways

This sharp contrast in charts illustrates some key problems for the individual investor who seeks solid information.

  1. Articles that emphasize a continuing trend seem less interesting and less “actionable.” Who cares about advice to stay the course?
  2. Articles that provide dramatic warnings capture attention.
  3. Charts that select short time periods and have big curved lines suggesting the future have inordinate power.

There is specific advice here: Do not over-estimate market risks from charts without context!

Latest comments

Risk Disclosure: Trading in financial instruments and/or cryptocurrencies involves high risks including the risk of losing some, or all, of your investment amount, and may not be suitable for all investors. Prices of cryptocurrencies are extremely volatile and may be affected by external factors such as financial, regulatory or political events. Trading on margin increases the financial risks.
Before deciding to trade in financial instrument or cryptocurrencies you should be fully informed of the risks and costs associated with trading the financial markets, carefully consider your investment objectives, level of experience, and risk appetite, and seek professional advice where needed.
Fusion Media would like to remind you that the data contained in this website is not necessarily real-time nor accurate. The data and prices on the website are not necessarily provided by any market or exchange, but may be provided by market makers, and so prices may not be accurate and may differ from the actual price at any given market, meaning prices are indicative and not appropriate for trading purposes. Fusion Media and any provider of the data contained in this website will not accept liability for any loss or damage as a result of your trading, or your reliance on the information contained within this website.
It is prohibited to use, store, reproduce, display, modify, transmit or distribute the data contained in this website without the explicit prior written permission of Fusion Media and/or the data provider. All intellectual property rights are reserved by the providers and/or the exchange providing the data contained in this website.
Fusion Media may be compensated by the advertisers that appear on the website, based on your interaction with the advertisements or advertisers.
© 2007-2025 - Fusion Media Limited. All Rights Reserved.