Wed, 15 May 2013
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It's all aboard for CSX, among others, in the index's quarterly rebalancing.
Berkshire's strong culture is a reminder that good management can help widen a moat , says Morningstar StockInvestor editor Matt Coffina.
An economic moat provides a gauge of a company's competitive advantages and overall strength, and it is a highly valuable tool for investors of all levels.
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