Wall Street's Monday Bullish Calls: Railroads, A.I. Stocks, Markel, and S&P 500

TL;DR
Wall Street is showing bullish sentiment towards railroads, with one particular railroad company receiving positive attention from investors.
- Wall Street gets bullish railroads on Monday, especially this one in particular CNBC
- Monday's biggest Wall Street analyst calls CNBC
- Hedge funds piled into these A.I. stocks during the first quarter CNBC
- Analysts are high on Markel, which models itself after Berkshire CNBC
- Bank of America hikes year-end target for S&P 500, citing focus by companies on efficiency and A.I. CNBC
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