Key PointsFirst-quarter manufacturing earnings are on watch as companies like Nucor give mixed signals. Within the trends, investors can find the true momentum behind the industry and why Nucor's business could push higher. Analysts see double-digit upside, and markets are willing to pay a premium for future revenues; here's why.5 stocks we like better than NucorAfter outperforming the Industrial Select Sector SPDR Fund NYSEARCA: XLI by more than 15% over the past five months, shares of Nucor Co. NYSE: NUE ...