Equity traders have an adage about the tendency for stocks to enter a lull during the summer. “Sell in May and go away” has been a staple for years but would have certainly been poor advice for the grain markets this year. Since the beginning of the month, July corn futures have rallied 67.75 cents, July soybeans are up 37.25 cents, and July SRW wheat has gained 78.5 cents. The rallies have been driven by (of course) the delayed planting across the Midwest and fund short covering. Commercial selling has been active at new market highs and has capped some rallies. The question now becomes whether commodity traders should “Buy in June and sing a tune” (hey, it’s not easy making up adages on the fly). The fundame...