Commodity prices are notoriously cyclical, and those who follow grain and oilseed markets may not fully appreciate the broader rally they had in 2016. Now there is of course considerable chatter and speculation about what 2017 may hold for commodity values.Commodity prices are notoriously cyclical. As measured by broad-based commodity price indices, they have suffered in a bear cycle that began in 2010. Somewhat to the surprise of those who had become accustomed to that environment, however, the bearish cycle apparently came to an end in 2016 when those commodity indices seemed to bottom and then begin to move higher. The result was that all major broad-based commodity indices posted yearly gains in 2016. This reversal was led most visibly...