I read the following contract specifications from CME and couldn't figure out/understand it. On Gold; Futures: Monthly contracts listed for 3 consecutive months, any Feb, Apr, Aug, Oct in the nearest 23 months and any Jun and Dec in the nearest 72 months. Options: Monthly contracts listed for 20 consecutive months and any June in December in the nearest 72 months.
On Silver; Futures: Monthly contracts listed for 3 consecutive months and any Jan, Mar, May, and Sep in the nearest 23 months and any Jul and Dec in the nearest 60 months. Options: Monthly contracts listed for 6 consecutive months, 3 months of March, May and September and any July and December in the nearest 60 months