Stock Exchange: 3 Anomalies That Beat The Market

May 04, 2018 6:16 AM ETVALE, USO, VIPS8 Comments11 Likes
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Jeff Miller


  • Is the market efficient, or are their opportunities to beat the market, particularly by exploiting attractive anomalies?
  • Momentum, seasonal declines, and niche strategies are three such anomalies that traders may want to consider.
  • Our regular participants offer specific trading ideas reflecting contrasting styles.

The Stock Exchange is all about trading. Each week we do the following:

  • Discuss an important issue for traders;
  • highlight several technical trading methods, including current ideas;
  • feature advice from top traders and writers; and,
  • provide a few (minority) reactions from fundamental analysts.

We also have some fun. We welcome comments, links, and ideas to help us improve this resource for traders. If you have some ideas, please join in!

Review: Dangerous Vomiting Camel Formation

Our previous Stock Exchange asked readers if they were reacting to the ominous Vomiting Camel pattern that is forming in the market.

Quill Cloud

And of course, this was meant as a joke, in order to poke fun at traders over-fitting the data when developing their trading programs. A glance at your news feed will show that the key points remain relevant.

This Week: 3 Anomalies That Beat The Market

An “anomaly” is something that deviates from what is standard, normal, or expected. And in trading and/or investing, a market anomaly (or market inefficiency) is a price and/or rate of return distortion that seems to contradict the efficient-market hypothesis. “Beating the market” is something many traders try to do, but few actually succeed. Throughout history, many market anomalies have been touted. Here are three such anomalies that beat the market.

1. Momentum, Per Gene Fama

Momentum is the market anomaly whereby rising stock prices tend to rise further, and falling stock prices tend to keep falling. And Eugene Fama is the Nobel Prize winner who came up with the Efficient Market Hypothesis (i.e. the theory that says stock prices fully reflect all available information, thereby making it impossible for anyone to consistently beat the market). Fama is not well-known or liked in popular media, but he is absolute royalty in the world of academia.

In an interview last week, Fama had some interesting things to say about the momentum anomaly in this interview:

Specifically, he said momentum is the one example of a market anomaly where the data is actually robust enough to make it difficult to deny momentum is a valid anomaly. We use momentum in our trading models, and we’ll give some specific examples later in this report.

2. Sell in May (or is it Buy?), and then Go Away!

Another longstanding trading mantra/anomaly is the idea that traders should “sell in May and go away” in order to avoid seasonal declines. However, popular author and founder of StockTwits, Howard Lindzon, has a different take on this well-known adage in his timely article:

3. Niche Strategies

One of the few advantages small traders and investors have over “the big guys” is the ability to participate in niche markets. For instance, this can include low-volume options markets and thinly traded bond markets. For example, Blue Harbinger’s favorite hedge fund is often able to move in and out of thinly traded bond issuances at attractive prices because of the fund’s relatively small size. This is an attractive niche space that a $10 billion PIMCO fund is simply too big to participate in with any significant degree of success.

Further still, even when data “proves” that anomalies exist, exploiting them in real life is often more challenging than meets the eye.

Model Performance:

Per reader feedback, we’re continuing to share the performance of our trading models.

We find that blending a trend-following / momentum model (Athena) with a mean reversion / dip-buying model (Holmes) provides two strategies, effective in their own right, that are not correlated with each other or with the overall market. By combining the two, we can get more diversity, lower risk, and a smoother string of returns.

And for these reasons, I am changing the “Trade with Jeff” offer at Seeking Alpha to include a 50-50 split between Holmes and Athena. Current participants have already agreed to this. Since our costs on Athena are lower, we have also lowered the fees for the combination.

If you have been thinking about giving it a try, click through at the bottom of this post for more information. Also, readers are invited to write to main at newarc dot com for our free, brief description of how we created the Stock Exchange models.

Expert Picks From The Models:

This week’s Stock Exchange is being edited by Blue Harbinger; (Blue Harbinger is a source for independent investment ideas).

Holmes: I sold Vipshop (VIPS) on May 1st for around $15.30 per share. Are you familiar with this stock, Blue Harbinger?

Blue Harbinger: Yes, we discussed VIPS when you purchased these shares for around $8.35 back in October. VIPS is a Chinese company, and it trades as an ADR. It’s basically an online discount retailer for brand names. They have flash sales where they have a limited amount of brand name products to sell. Did you sell because it’s May, and you believe in the mantra “sell in May, and go away” that was covered earlier.

Holmes: No, that’s not the reason. As you know, I am a “dip-buyer.” And as you can see in the chart below, the shares have recovered nicely since they dipped back in October.

BH: Not a bad trade, Holmes. Looks like you made some money. Was there something in the fundamentals you saw that caused you to sell? Here is the Fast Graph.

Holmes: Thanks for asking and sharing, but you know I am a model, and all of my trades are generated systematically and based on the technicals.

BH: True. And again, nice trade. How about you Road Runner—any trades this week?

Road Runner: Yes. This week I purchased Brazilian company, VALE (VALE). The company engages in the production and exportation of iron ore, pellets, manganese, and iron alloys, which are raw materials needed for steelmaking.

BH: Interesting. I know you like to buy stocks in the lower end of a rising channel. And based on the following chart, I can see why you purchased VALE.

Road Runner: That’s exactly right. And you also know that my typical holding period is only around 4-weeks, right?

BH: Yes, I did know that too. VALE announced earnings near the end of April, and results were slightly below expectations, which caused the dip. Here is a look at the Fast Graph.

Road Runner: Thanks for that background; it’s always interesting to hear you make up a story to fit the chart.

BH: It’s not a made up story—that’s what happened. Q1 EPS was $0.31, $0.05 below expectations, and revenue was $8.6B (+0.9% Y/Y), $150M below expectations. Anyway, how about you, Athena—any trades?

Athena: Yes. Like Holmes, this week I sold my shares of Vipshop (VIPS). However, unlike Holmes, I bought my shares in early January.

BH: Looks like you didn’t do as well as Holmes on your trade. Why’d you sell, Athena?

Athena: I sold according to my trading program. It was a combination of time (I usually hold about 17-weeks), price, and some additional propriety factors. I didn’t make money on this trade, but I didn’t lose much either. Losing less on your losers than you make on your winners is better than the other way around.

BH: True. And thank you. How about you Felix—any trades?

Felix: No trades to share this week, but I do have a ranking for you. Specifically, I ran the Nasdaq 100 through my model, and I’ve listed the top 20 below.

BH: Interesting ranking. What are the criteria?

Felix: I am a momentum trader. However, my typical holding period is around 66 weeks, on average—much longer than the other traders.

BH: I like your top 3 picks this week. They’ve certainly had momentum over the last year, and they’ve also got the fundamentals to keep running, in my view. How about you, Oscar—anything to share this week?

Oscar: Yes, this week I ranked our “diverse and comprehensive ETF universe.” Here are the top 20.

BH: I see Oil (USO) ranked at the top. This makes sense considering you are a momentum/trend-follower trader, and oil prices continue to rally, even though they’re still far below where they were in early 2014.

Oscar: Yes. Our version of momentum is more complicated than simply securities that have been rallying, but you have the general idea right.


Many market anomalies are discussed by traders, but only some of them are supported by data, and they’re often challenging to implement in real life. However, as shown in our earlier performance table, we’ve been having success with our trades. Further, our various trading programs have the ability to operate in certain niche market spaces, thereby giving us more opportunities to beat the market in terms or risk versus reward, and because our strategies can often add highly valuable diversification benefits because of their lower correlations with the overall market.

Background On The Stock Exchange:

Each week, Felix and Oscar host a poker game for some of their friends. Since they are all traders, they love to discuss their best current ideas before the game starts. They like to call this their "Stock Exchange." (Check out Background on the Stock Exchange for more background). Their methods are excellent, as you know if you have been following the series. Since the time frames and risk profiles differ, so do the stock ideas. You get to be a fly on the wall from my report. I am usually the only human present and the only one using any fundamental analysis.

The result? Several expert ideas each week from traders, and a brief comment on the fundamentals from the human investor. The models are named to make it easy to remember their trading personalities.

Stock Exchange Character Guide:




Average Holding Period

Exit Method

Risk Control


NewArc Stocks


66 weeks

Price target

Macro and stops


“Empirical” Sectors


Six weeks




NewArc Stocks


17 weeks

Price target



NewArc Stocks

Dip-buying Mean reversion

Six weeks

Price target

Macro and stops


NewArc Stocks

Stocks at bottom of rising range

Four weeks






Long term

Risk signals

Recession risk, financial stress, Macro

Getting Updates:

Readers are welcome to suggest individual stocks and/or ETFs to be added to our model lists. We keep a running list of all securities our readers recommend, and we share the results within this weekly “Stock Exchange” series when feasible. Send your ideas to "etf at newarc dot com." Also, we will share additional information about the models, including test data, with those interested in investing. Suggestions and comments about this weekly “Stock Exchange” report are welcome.

This article was written by

Jeff Miller profile picture
Seeking Alpha mourns the passing of Jeff Miller, on May 7, 2021. During his time at Seeking Alpha, Jeff attracted a following of close to 40,000 readers and published more than 1,500 articles. He was a portfolio manager at Incline Investment Advisors, LLC. Jeff also was President of NewArc Investments, Inc., and served as a university professor.....................................................................................................................................Jeff is Portfolio Manager for Incline Investment Advisors, LLC.,manager of both individual and institutional investments. A registered investment advisor, he was formerly President of NewArc Investments, Inc. Jeff is a former college professor with a hands-on, real world attitude. His quantitative modeling helped inform state and local officials in Wisconsin for more than a decade. A Public Policy analyst, he taught advanced research methods at the University of Wisconsin, and analyzed many issues related to state tax policy. Jeff began in the financial business as Research Director for a trading firm at the Chicago Board Options Exchange. He investigated anomalies in the standard option pricing models, taught classes for beginning options traders, and developed new forecasting techniques. In 1991 he established a general research consultancy, working with professional traders at all of the Chicago financial exchanges. In 1998 he started NewArc Investments, Inc. Jeff has a commitment to the specific needs of individual investors. It is not a one-size-fits all approach, but one that emphasizes the unique circumstances of each client. Jeff also serves on the board of a small technology company. He occasionally serves as an expert witness in legal cases involving financial markets and hedging.

Disclosure: I am/we are long VALE. I wrote this article myself, and it expresses my own opinions. I am not receiving compensation for it. I have no business relationship with any company whose stock is mentioned in this article.

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