Earlier this week, we were asked why grain and soy futures markets do not seem to be taking the lack of rainfall and resulting dryness in portions of Brazil and Argentina very seriously, especially with typical La Nina weather conditions likely to acerbate the situation in the weeks ahead. Our reply was that they do not see a measurable problem – at least not yet. That is an overly simple answer to a question about a very complex situation, but it did prompt us to think about the current state of play regarding South American weather. There are some things that should be considered in a discussion of markets, the current weather situation in Brazil and Argentina, and the potential impact from La Nina. Among them are the following:...