Why are VOO, SPY, DIA, and QQQ ETFs in a major bull run?

Core Viewpoint - The stock market is experiencing a strong bull run, with major indices such as the S&P 500, Dow Jones, and Nasdaq 100 reaching all-time highs [1] Group 1 - The S&P 500 index is a key indicator of market performance, and its ETFs like VOO are gaining popularity among investors [1] - The current market conditions suggest a favorable environment for equity investments, particularly in index funds [1] - The performance of the top indices reflects investor confidence and economic recovery trends [1]