This study investigates speculative bubbles in the cryptocurrency market and factors affecting bubbles during the COVID …-19 pandemic. Our results indicate that each cryptocurrency covered in the study presented bubbles. Moreover, we found … was evident among investors; however, this diminishes during bubbles, indicating that bubbles are not explained by herd …

-like demand, that is, speculation sentiment. The leveraged ETFs' primary market is a novel setting that provides observable … proxies for the magnitude and direction of speculative demand shocks and I use it to form the Speculation Sentiment Index …. Using the index, I show that speculation sentiment is contrarian; For example, it is bullish in down markets. I also find …

not generate the price bubbles observed in previous studies with student subjects; traders aggregate private information …

Bubbles are omnipresent in lab experiments with asset markets. Most of these experiments were conducted in environments … smaller bubbles if human traders expect algorithmic traders to be present. …

Bubbles are omnipresent in lab experiments with asset markets. But these experiments were (mostly) conducted in … clearly smaller bubbles if human traders expect algorithmic traders to be present. …