I'm not sure how to get the historical curve in a cost-effective way. You can chart the individual calendar spreads on barchart.com. Type "GEZ11-GEZ12" into the chart window and you will get a close-only chart of that spread.
I'm not sure how to get the historical curve in a cost-effective way. You can chart the individual calendar spreads on barchart.com. Type "GEZ11-GEZ12" into the chart window and you will get a close-only chart of that spread.