CBOT December #corn futures have rallied about 33% since March 1. Nothing has ever come close within the same time frame in nearly 50 years. The best Mar 1 - May 6 rally was 13% in both 1973 and 1987.

Putting some labels on it. Most of the strong outlier years are well in the past.

Here's looking at just the past 20 years. December #corn rose 15% from March 1-May 10, which is probably the closest comparison with 2021's +33% since March 1.

This is what happens when you extend the chart out through expiration in December, still keeping with just the past 20 years. 2012, 2010, 2006, 2011, and even 2008 earlier on saw huge gains since March 1. Biggest eventual losers were 2004, 2008, 2013 and 2014.

And just for fun, here is adding back in all years since 1973, extending out to December. By August, #corn in 1973 had gained more than 100% since March 1. 1988 was up more than 60% in late June/early July.

1973 was the Great Grain Robbery, 1988 was a massive U.S. drought.

FYI: why am I looking at March 1? That can sort of be considered the unofficial start of spring and the U.S. growing season, and it is when USDA starts asking farmers for their planting intentions for the upcoming harvest. It also marks the end of price discovery month (Feb).

And if you've made it this far into the thread, here's a fun fact for you: March 1 is actually my birthday

I was not born on a leap year so I was not at risk of February 29!