V2I5P51

A Study of Anomalies on Indian Stock Market

Bhaskar A V^1*, Santhosh V², Parul Tandan³

Abstract

The Indian stock market, one of the largest and most dynamic among emerging economies, has experienced substantial growth and transformation over the past few decades. Liberalization policies introduced in the early 1990s, combined with globalization and technological advancements, have contributed to the increasing participation of both domestic and foreign investors. Despite these advancements, the market continues to display inefficiencies and behavioral tendencies that offer fertile ground for the study of stock market anomalies. Traditional financial theories, particularly the Efficient Market Hypothesis (EMH), suggest that stock prices fully incorporate all available information, thereby negating the possibility of consistently achieving abnormal returns. However, empirical evidence from markets worldwide indicates recurring deviations from this principle. These deviations, termed “anomalies,” represent patterns of returns inconsistent with EMH and challenge the notion of rational investor behavior. The existence of such anomalies offers potential opportunities for investors to formulate profitable strategies while simultaneously questioning the universality of traditional financial models. This thesis primarily investigates three well-documented stock market anomalies within the context of the Indian stock market: the size effect, momentum effect, and value effect. The size effect refers to the consistent outperformance of small-cap stocks relative to large-cap stocks, even after adjusting for risk. The momentum effect highlights the phenomenon where stocks exhibiting superior past performance continue to generate positive returns over short- to medium-term horizons. Lastly, the value effect indicates that stocks with lower valuation metrics, such as low Price-to-Earnings (P/E) or Price-to-Book (P/B) ratios, outperform their high-growth counterparts in the long run.

Although these anomalies have been extensively studied in developed markets like the United States and Europe, emerging markets such as India present unique attributes that warrant deeper analysis. The Indian market is characterized by higher volatility, greater information asymmetry, regulatory transitions, and a significant presence of retail investors, all of which potentially amplify or alter the behavior of these anomalies. Behavioral finance factors such as overconfidence, herd behavior, and loss aversion are particularly prevalent among Indian investors, further influencing the manifestation of inefficiencies in the market. The findings reveal that all three anomalies are present and statistically significant in the Indian stock market, albeit with varying degrees of persistence across different periods. The size effect is notably strong, supporting the argument that small-cap stocks offer higher risk-adjusted returns compared to large-cap stocks. Momentum strategies based on prior winners also demonstrate substantial profitability over short horizons, highlighting potential for tactical asset allocation. The value effect remains evident, particularly during market downturns, suggesting that undervalued stocks provide resilience and long-term outperformance.

These insights carry practical implications for investors, fund managers, and policymakers. By acknowledging the presence of anomalies, investment strategies can be optimized to exploit these inefficiencies. Simultaneously, regulators and policymakers may consider measures to enhance transparency and reduce information asymmetry, contributing to improved market efficiency.

Keywords:

Anomalies; Indian stock Market; Stocks; Investors; Policymakers