Primary Peg™
Functionality
Example Scenario
Quote is Stable. The Signal is "Off."
Primary Peg buy order booked at $10.09, 1 MPV below the NBB. The NBBO is $10.10 x $10.14, during a period of quote stability.
- Example 1: Sell ISO with a $10.09 limit crosses the spread and executes with the Primary Peg order at its resting price of $10.09.
- Example 2: Sell order with a $10.10 limit crosses the spread and the Primary Peg order exercises price discretion to execute on the NBB at $10.10.
- Example 3: Sell order with a $10.11 limit enters but doesn’t trade with the Primary Peg order, because Primary Peg orders cannot execute at prices more aggressive than the NBB for buy orders (or NBO for sell orders); no trade occurs.
One
Quote is Crumbling. The Signal is “On.”
Primary Peg buy order booked at $10.09, 1 MPV below the NBB. The NBBO is $10.10 x $10.14, during a period of quote instability (i.e., the quote is crumbling).
- Example 1: Sell ISO with a $10.09 limit crosses the spread and executes with the Primary Peg order at its resting price of $10.09.
- Example 2: Sell order with a $10.10 limit crosses the spread, but the Primary Peg order does not exercise price discretion while the Signal is on; no trade occurs.
- Example 3: Sell order with a $10.11 limit enters but doesn’t trade with the Primary Peg order, because Primary Peg orders cannot execute at prices more aggressive than the NBB for buy orders (or NBO for sell orders); no trade occurs.
Two
Example Scenario
One
Two
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