The wealth manager gives them a personal-finance guidebook, introduces them to the firm's staff and explains that a Roth IRA "is one of the few IRS-sponsored techniques where they can pay tax on their money and not ever have to again, " he says.

WSJ: It Pays to Stock Kids' IRAs

"The most important thing is for Arcelor to let its shareholders decide what should happen, not the other way round, " said Olivier de Guerre, fund manager at Paris-based Phi Trust Finance, which owns Arcelor shares.

BBC: NEWS | Business | Mittal and Arcelor to hold talks