Natural systems witness reversion and divergence simultaneously across different periods of time. This paper tests the performance proxy as mentioned in a previous paper on the ‘Mean Reversion Framework’ for Markov’s transition probabilities.

The original work by Galton on mean reversion in 1886 emphasized relative before absolute, talked about the relation of the variable with the sample average, pointed out the balance between convergence and divergence and showcased cross-domain expression of mean reversion.

Searching for alpha is searching through inefficiency because there are no supernormal returns in efficiency. This seems intuitive and correct because there is a cost to searching through inefficiency. And agents who spend that cost have to be rewarded for that effort. The case for inefficiency is unassailable.

I really don’t know why Richard Thaler chose this headline for a research paper. Many other behavioral finance academic papers also capture attention. “Can the markets add and subtract?”; “The winner’s curse”; “The gambler’s fallacy”, “Does the stock market overreact?” While the popularity of the subject has increased and behavioral biases have got so pervasive…

Style box for the investor is a visual representation of investment characteristics for stocks, fixed income and mutual funds offered as a comparative tool to investors around the world for helping them determine asset allocations based on their risk preference.

Somehow my Interdisciplinary mind registered Eugene faster than Fama. After all Eugene Stanley, the father of Econophysics could also get a Nobel. If Psychologists could get the biggest award for Economics, a physicist could have been there too. But then the surprise became bigger, not because it was Fama, not Stanley but because Robert Shiller…

Data models should work across regions, across nature, across data sets. This means “Data Universality”. If natural phenomenon exhibit universal patterns like geometry, outliers, 80-20 principle, mean reversion, fat tails etc. then the data these natural phenomena generate should also express a similar behavior; actually they do. But we still consider data sets as religious,…

Why is the stock market not a science? Today many elements of our life have a degree of predictability, consumption patterns, social behavior, earthquakes, etc. However, the predictive measure is lacking when it comes to stock markets. Behavioral finance highlighted this lacking measure and accountability. Even statisticians limit themselves to the prediction of stock market…

In 1827, Robert Brown saw a random movement of pollen particles in water. This was called Brownian motion, also the drunkard’s walk. In 1902, Einstein proved this and confirmed the presence of atoms and molecules. This was 100 years after the atomic theory was proposed by John Dalton and was the first attempt to reconcile…

Christmas is about making wishes. However, some wishes are not reasonable. For example, wishing for a universal database is wishful thinking, as such a database would need a lot of server space. I am not speaking of a smart stock market database but a database for every organic data from the stock markets to the…