With the huge migration to passive investment, much less analysis is going on in the equities markets. After all, passive investment only buys a basket of stocks to replicate the index. Passive investment managers don't analyze stock fundamentals.
I always revisit older books that I have read to re-establish my intellectual grounding around equity investment. Lately, I have been listening to The Intelligent Investor audio version. With all that is going on in the market, it is a great time to "renew your vows".