The cost of cocoa beans has surged to a record $10,000 per metric ton. That's expected to make chocolate more expensive for millions of confectionary fans around the world. But why have prices more than doubled in the past few months alone? And what could halt the surge? We speak with Bloomberg Opinion columnist and Odd Lots favorite Javier Blas. He describes how a combination of chronic underinvestment in cocoa supply has run head first into financial markets to squeeze prices higher.

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