Here's the case for why Federal Signal's multibagging returns may prove to be just getting started. One of my favorite types of stocks to find are businesses that hold leadership positions in niches that are off the beaten path. Often holding a No. 1 or No. 2 market share in these smaller industry nooks, these companies sometimes have a wider-than-expected moat because would-be competitors have little incentive to disrupt such diminutive areas. Federal Signal (FSS 1.02%) is a perfect example of this concept ...