For those who buy and hold for 6-12 months: What do you think of stock recommendations by the big names?

I'm thinking JPMorgan Chase & Co., The Goldman Sachs Group, Morgan Stanley, Bank of America, Citigroup, Barclays, UBS Group, Deutsche Bank Aktiengesellschaft. All of them issue buy recommendations.

I'm considering checking their recommendations, compile \~10 stocks most of them agree are promising, buy them, then check for any changes monthly. Would this be a good idea?

Also, in addition to personal experience, are there any actual studies on their recommendations? Something like "if you had followed JP Morgan's suggestions you would have made 55% during 2025"?