L.B. Foster Company (FSTR) registered a 14.3% rise in its stock value in the past three months thanks to robust first-quarter earnings that exceeded expectations.Presenting an enticing investment opportunity with strong growth prospects, FSTR sports a Zacks Rank #1 (Strong Buy).Earnings OutperformanceIn the first quarter, FSTR outperformed expectations, with adjusted earnings of 8 cents per share, surpassing the Zacks Consensus Estimate of a loss of 16 cents. It pulled off a trailing four-quarter earnings s ...