Ten dollars ($10) times the Dow Jones Industrial Average Index.  The DJIA is a price-weighted index of thirty (30) stocks. 

Cash settlement on the final settlement day. The final settlement price is $10 times a Special Opening quotation of the index.

Minimum price increment is one index point (equal to $10 per contract).

The DJIA Index, quoted in index points.

Mar, Jun, Sep, Dec.  Four nearest months in March quarterly cycle and two additional December contracts listed at all times.

The trading day preceding the final settlement day.

Open Auction and Electronic.

Open Auction: 7:20 a.m. to 3:15 p.m. Central Time, Monday – Friday.
Electronic: 6:15 p.m. to 7:00 a.m. Central Time, Sunday – Friday.
Trading in expiring contracts ceases at 3:15 p.m. Central Time on the last trading day. 

Open Auction: DJ
Electronic: ZD

Fungibility

BIG Dow futures ($25 multiplier), mini-sized Dow futures ($5 multiplier), and DJIA futures ($10 multiplier) are fungible contracts

Successive 10%, 20%, and 30% limits.  For details, please see CBOT Regulation 1008.01.

The aggregate position limit in BIG Dow futures ($25 multiplier), mini-sized futures and options ($5 multiplier), and DJIA futures and options ($10 multiplier) is 50,000 DJIA futures ($10 multiplier) equivalent contracts, net long or short in all contract months combined. 

Maintenance Margin (per contract) - $5,000
Initial Margin Mark Up Percentage - 125%
Initial Margin (per contract) - $6,250