This paper investigates the role played by the social media platform Reddit in the events around the GameStop (GME) share rally in early 2021. In particular, we analyze the impact of discussions on the r/WallStreetBets subreddit on the price dynamics of the American online retailer GameStop. We customize a sentiment analysis dictionary for Reddit platform users based on the Valence Aware Dictionary and Sentiment Reasoner (VADER) sentiment analysis package and perform textual analysis on 10.8 million comments. The analysis of the relationships between Reddit sentiments and 1-, 5-, 10-, and 30-min GameStop returns contribute to the growing body of literature on “meme stocks” and the impact of discussions on investment forums on intraday stock price movements.

中文翻译：

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“我就是喜欢这只股票”：Reddit 情绪在 GameStop 股价上涨中的作用

本文调查了社交媒体平台 Reddit 在 2021 年初 GameStop (GME) 股价上涨事件中所扮演的角色。特别是，我们分析了 r/WallStreetBets subreddit 上的讨论对美国在线股票价格动态的影响零售商 GameStop。我们基于 Valence Aware Dictionary and Sentiment Reasoner (VADER) 情感分析包为 Reddit 平台用户定制情感分析词典，并对 1080 万条评论进行文本分析。对 Reddit 情绪与 1、5、10 和 30 分钟 GameStop 回报之间关系的分析有助于越来越多的关于“模因股”的文献以及投资论坛上的讨论对盘中股价走势的影响。