STOCKHOLM, Sweden—Is it strange that guarding giant Securitas, which divested itself of its systems integration business (Securitas Systems, now Niscayah) five years ago, this week made a bid to buy that very same business back? It may be an unusual situation, but it's a deal that makes a lot of business sense for both Securitas and Niscayah, Imperial Capital's John Mack told Security Systems News. And it's a deal that Mack predicted is likely to get done. “You can see the rationale,”...