Figure - available via license: Creative Commons Attribution-ShareAlike 4.0 International
Content may be subject to copyright.
Source publication
The Random Walk Hypothesis (RWH) states that stock prices move randomly in the stock market without following any regular or particular pattern and as such historical information contained in the past prices of stocks cannot be used to predict current or future stock prices. Hence, stock prices are unpredictable and that investors cannot usurp any...
Context in source publication
Context 1
... means that the NSE stock returns do not follow a random walk. From the results of variance ratio test under heteroskedasticity assumption reported in Table 6, the p-values for both joint test and test for individual periods are highly statistically significant at 1% marginal significance levels, indicating the rejection of the null hypothesis (NSE ASI RETURNS is a martingale). ...Similar publications
The study aims to empirically analyze the reaction of stock prices to the information about the conclusion and acceptance of a debtor–creditor arrangement under restructuring proceedings of companies listed on the stock exchange in Poland. The following main research hypothesis was verified: public disclosure of information about an arrangement con...
The landscape of stock market prediction is undergoing a profound transformation driven by technological advancements and data-driven methodologies. Within this shifting paradigm, artificial intelligence (AI), particularly deep learning (DL), is emerging as a transformative tool to enhance predictive accuracy. This systematic literature review expl...
For vaccine companies, the announcements of beginning and ending of COVID-19 vaccine development are milestones of vaccine companies. Few studies have explored how announcements of COVID-19 vaccine affect stock market returns of vaccine companies. In this work, we match the announcements of beginning and ending of COVID-19 vaccine development with...
This study analyzes the effects of equity market mispricing on firm innovation. Using a sample of nearly 450 non-financial listed firms in Vietnam from to 2014-2023, the authors examine whether firm innovation is sensitive to stock mispricing. Adopting the method of Rhodes-Kropf et al. (2005), the authors estimated the difference between market cap...
Optimizing portfolio has been a popular topic since it was proposed because it can reduce the investment risk. This study selected five active stocks from different industries, including Online E-Commerce, Commercial Banks, Motor Vehicles, Mobile Communication Production, and Telecommunications. Then they were allocated into five kinds of portfolio...
