Abstract
This study delves into the exploration of calendar effects within
Bitcoin returns to examine the validity of the Efficient Market Hypothesis
(EMH) in the context of the cryptocurrency market. Leveraging data spanning
from October 2015 to November 2021, this research employs regression analysis
and power ratio analysis to investigate the presence of day-of-the-week and
intraday effects on Bitcoin prices. The findings reveal statistically
significant anomalies for Fridays and specific intraday periods, suggesting the
potential for abnormal returns. However, these calendar effects are not
pervasive enough to conclusively impact overall market efficiency. The study's
results indicate that while Bitcoin's market may exhibit short-term
inefficiencies, it largely conforms to the principles of market efficiency over
extended periods. This research contributes to the ongoing discourse on the
efficiency of cryptocurrency markets and highlights the necessity for further
investigation using diverse methodologies to fully understand the dynamics at
play.
Keywords: Calendar Effect,
Bitcoin Price, Regression Analysis, Power Ratio.