8. CFOing a DRK Order 19 9. Last Sale Price for DRK Midpoint Peg and CMO+ Orders 19 10. Identifying an Execution Against DRK Liquidity 19 11. Disabling an Re-enabling DRK Orders 19 11.1 Disabling of DRK Orders 20 11.2 Re-enabling DRK Orders 20 11.2.1 Symbol Level 20 11.2.2 Market Level 20 12. Order Entry 20 13. Broadcast Feed 20 13.1 Reconciliation Feed 21 13.1.1 Table 2: Summary of Order Entry and Market Data Feed Specification Changes 21 14. Appendix A: Scenarios 27 14.1 DRK Trading Scenarios 27 14.1.1 Determining the price for a DRK Midpoint Peg Trade 27 14.1.2 Reassigning the executable price of a DRK Midpoint Peg order 28 14.1.3 Assigning the executable price of a DRK Limit order 29 14.1.4 DRK Limit order’s executable price being reassigned due to Small Order bypassing the DRK Limit order 30 14.1.5 Small incoming order trading with a DRK Limit order at the NBBO 31 14.1.6 Determining the price for a DRK Minimum Price Improvement (MPI) Peg 32 14.1.7 Determining the price for a DRK MPI Peg – 1 tick spread 32 14.1.8 Determining the price for a DRK Primary Peg – passive offset 33 14.1.9 Determining the price for a DRK Primary Peg – aggressive offset 33 14.1.10Determining the price for a DRK Market Peg (i) 34 14.1.11Determining the price for a DRK Market Peg (ii) 34 14.1.12Determining the price for a DRK Market Peg (iii) 35 14.1.13C MO+ order bypassing non-CMO+ orders to trade against another resting CMO+ order 35 14.1.14CMO+ Dark Sweep order trading against other DRK orders on entry 36 14.1.15Resting CMO+ orders being bypassed by incoming non-CMO+ orders 36 14.1.16PDL order trades against a SDL order (IOC/FOK) 37 14.1.17PDL order XM – No Trade instruction triggered 37 14.2 MIN and MIS Scenarios 37 14.2.1 DRK Limit with MIS 37 14.2.2 Active Orders Eligible to Interact with a Passive DRK Limit with MIS 38 14.2.3 DRK Limit with MIS matching with passive DRK order to satisfy MIS condition 38 14.2.4 Active DRK Limit order with MIS not eligible to trade with a passive visible order 39 14.2.5 Active DRK Limit order with MinQty not eligible to trade 39 14.2.6 Active DRK Limit order with MinQty eligible to trade 40 14.2.7 Active DRK Limit order with MinQty trading against a resting DRK Limit order with MinQty 40 14.2.8 Passive DRK Limit with a MinQty condition bypassed 41 14.3 Conditional Order Interaction Scenarios 41 14.3.1 Pro-rata allocation for Firm-up to Firm-up orders execution 41 14.1.2 Remaining volume from Firm-up trade sweeps the dark book 42 14.1.3 Dark Opt-in Order triggers invitation in the Conditional book 43
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