It's easier than ever for everyday investors to access IPOs. Online brokerages like Robinhood and SoFi have lowered the barriers to entry, allowing anyone with an investment account (and a little bit of luck) to buy shares of companies about to go public. ...

Core Insights - Robinhood shares experienced a decline after being excluded from the S&P 500 Index rebalance, which was anticipated by the market [2][3] - The S&P 500 rebalance is a significant event that can lead to substantial trading activity and increased demand for shares of companies added to the index [3] - Despite the recent sell-off, Robinhood's stock has shown a strong recovery this year, with shares doubling in price and reaching a record high last week [4] Group 1 - Robinhood shares dropped nearly 5% in premarket trading following the announcement of the S&P 500 rebalance [1] - The stock had previously rallied 3.3% on Friday, contributing to a weekly gain of over 13% before the S&P Dow Jones Indices' announcement [1] - Bank of America had identified Robinhood as a top candidate for inclusion in the S&P 500 prior to the rebalance [3] Group 2 - The S&P 500 rebalance typically occurs on the third Friday of the last month in a quarter and can trigger billions of dollars in trading [3] - Companies added to the S&P 500 can expect significant buying from passive funds in the weeks following their inclusion [3] - Coinbase's stock surged 24% after its inclusion in the S&P 500, highlighting the potential impact of such events [4]