Core Insights - ProShares Short QQQ ETF (PSQ) is designed to provide a way to short the Nasdaq-100, represented by the Invesco QQQ Trust ETF (QQQ) [1] Group 1: Company Overview - ProShares Short QQQ ETF (PSQ) allows investors to take a short position on the Nasdaq-100 index [1] Group 2: Market Context - The article highlights the importance of understanding market behavior and investment psychology, emphasizing a contrarian approach to investing [1]