Sports Betting used to explain Value and Momentum Effects Tuesday, 28 July, 2015

#14 - Momentum Effect in Stocks
#26 - Value (Book-to-Market) Anomaly

Authors: Moskowitz

Title: Asset Pricing and Sports Betting

Link: http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2635517

Abstract:

I use sports betting markets as a laboratory to test behavioral theories of cross-sectional asset pricing anomalies. Two unique features of these markets provide a distinguishing test of behavioral theories: 1) the bets are completely idiosyncratic and therefore not confounded by rational theories; 2) the contracts have a known and short termination date where uncertainty is resolved that allows any mispricing to be detected. Analyzing more than a hundred thousand contracts spanning two decades across four major professional sports (NBA, NFL, MLB, and NHL), I find momentum and value effects that move betting prices from the open to the close of betting, that are then completely reversed by the game outcome. These findings are consistent with delayed overreaction theories of asset pricing. In addition, a novel implication of overreaction uncovered in sports betting markets is shown to also predict momentum and value returns in financial markets. Finally, momentum and value effects in betting markets appear smaller than in financial markets and are not large enough to overcome trading costs, limiting the ability to arbitrage them away.

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Fractal mathematics used to explain #14 - Momentum Effect in stocks Wednesday, 22 July, 2015

#14 - Momentum Effect in Stocks

Authors: Berghorn, Otto

Title: Mandelbrot Market-Model and Momentum

Link: http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2620112

Abstract:

Mandelbrot has significantly contributed in many ways to the area of finance. He was one of the first who criticized the oversimplifications centered around the early stochastic process models of Bachelier utilizing normal distribution. In his view, markets were fractal and much wilder than classical theory suggests. Additionally, he was a profound critic of the efficient markets hypothesis. Particularly, his work of fractional Brownian motion showed that the independence claim made by that hypothesis is not valid; in addition, he proposed a multi-fractal asset model to reconcile for effects observed in the market. However, it is also known that his vision of fractal markets used fractal trends. Recently, we were able to show that the scaling behaviour of trends, as defined by a specific trend decomposition using wavelets, are the root cause for the momentum effect. Additionally, we were able to show that these trends have fractal characteristics. In this work, we will revisit Mandelbrot’s vision of fractal markets. We will show that the momentum effect discussed heavily in literature can be modeled by the so-called Mandelbrot Market-Model. Additionally, this model shows, from the risk side, that markets are wilder because of trend structures compared with classical models. In conclusion, we derive what Mandelbrot always knew: There are no efficient markets.

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Interesting research paper sheds light on multiple anomalies Thursday, 16 July, 2015

#14 - Momentum Effect in Stocks
#25 - Small Capitalization Stocks Premium Anomaly    
#26 - Value (Book-to-Market) Anomaly
#38 - Accrual Anomaly
#52 - Asset Growth Effect

Authors: Fan, Opsal, Yu

Title: Equity Anomalies and Idiosyncratic Risk Around the World

Link: http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2611047

Abstract:

In this study, we examine how idiosyncratic risk is correlated with a wide array of anomalies, including asset growth, book-to-market, investment-to-assets, momentum, net stock issues, size, and total accruals, in international equity markets. We use zero-cost trading strategy and multifactor models to show that these anomalies produce significant abnormal returns. The abnormal returns vary dramatically among different countries and between developed and emerging countries. We provide strong evidence to support the limits of arbitrage theory across countries by documenting a positive correlation between idiosyncratic risk and abnormal return. It suggests that the existence of these well-known anomalies is due to idiosyncratic risk. In addition, we find that idiosyncratic risk has less impact on abnormal return in developed countries than emerging countries. Our results support the mispricing explanation of the existence of various anomalies across global markets.

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New academic paper related to #12 - Pairs Trading with Stocks Thursday, 9 July, 2015

#12 - Pairs Trading with Stocks

Authors: Goncu, Akyildrim

Title: Statistical Arbitrage with Pairs Trading

Link: http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2610064

Abstract:

We analyse statistical arbitrage with pairs trading assuming that the spread of two assets follows a mean-reverting Ornstein-Uhlenbeck process around a long-term equilibrium level. Within this framework, we prove the existence of statistical arbitrage and derive optimality conditions for trading the spread portfolio. In the existence of uncertainty in the long-term mean and volatility of the spread, statistical arbitrage is no longer guaranteed. However, the asymptotic probability of loss can be bounded as a function of the standard error of the model parameters. The proposed framework provides a new filtering technique for identifying best pairs in the market. Empirical examples are provided for three pairs of stocks from the NYSE.

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Practical academic paper related to #100 - Trading WTI/BRENT Spread Monday, 6 July, 2015

#100 - Trading WTI/BRENT Spread

Authors: Donninger

Title: The Poverty of Academic Finance Research: Spread Trading Strategies in the Crude Oil Futures Market

Link: http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2617585

Abstract:
Harvey, Liu and Zhu argue that probably most of the Cross-Section of Returns literature is garbage. One can always try an additional factor and will find a significant Cross-Sectional result with enough trial and error. Lopez de Prado argues in a series of articles in a similar vein. Theoretically scientific results are falsifiable. Practically previous results and publications are checked only in rare occasions. Growth in a Time of Depth by Reinhart-Rogoff was the most influential economic paper in recent years. It was published in a top journal. Although the paper contained even trivial Excel-Bugs it took 3 years till the wrong results and the poor methodology was fully revealed. The reviewers did not check the simple spreadsheets. This paper analyzes a less prominent example about spread trading in the crude oil futures market by Thorben Lubnau. The author reports for his very simple strategy a long term Sharpe-Ratios above 3. It is shown that – like for Reinhart-Rogoff – one needs no sophisticated test statistics to falsify the results. The explanation is much simpler: The author has no clue of trading. He used the wrong data.

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