Market Participant Identifiers (MPIDs) and Interactive Brokers

SEC Regulation SHO requires that upon receipt of a short sale order involving U.S. equity securities (“stocks”), Interactive Brokers LLC (“IB”), as executing broker, identify the location of the shares that are to be delivered in time for settlement of the trade.

If an IB customer does not clear its trades through IB, but uses a separate clearing broker or custody agent, the customer must arrange with its clearing broker or custody agent to borrow the shares that are to be delivered in time for settlement of the short sale transaction, and indicate to IB the location of these shares. The location will be the customer’s clearing broker or custody agent which may have a valid MPID assigned by the Financial Industry Regulatory Authority (FINRA), or the customer may request that IB assign a four letter location code.

Below is a list of valid FINRA MPIDs or IB Assigned Location Codes most commonly used by those IB customers who use a clearing broker or custody agent other an IB:


Clearing Broker FINRA Valid MPID IB Assigned Location Code
Bank of New York BONY
Societe General New York SGNY
Brown Brothers Harriman BBHC
Swiss American Securities Inc. SWIS
Interactive Brokers LLC IBKR
First Clearing, LLC FCCP
Ameritrade Inc. FOMA
Penson Financial Services, Inc. PFSI
Goldman Sachs (formerly, LIT Division of FOC) GLDS
Bear Stearns Securities Corp. BSSC
USAA Investment Management Company USAA
E*Trade Clearing LLC ETRS
ABN AMRO Inc. ABNA
CIBC World Markets Corp. CWMK
Goldman Sachs Execution and Clearing, LP. GLDS
Merrill Lynch Professional Clearing Corp. PRST
Deutsche Bank Securities, Inc. DBPR
Fiserv Securities Inc. BHCS
PAX Clearing Company Limited Partnership PXCO
GSECLP/FOC GLDS
Scott & Stringfellow, Inc. BBNT
McDonald Investments, Inc. MDLD
JP Morgan Chase Bank JPMS
Citibank, N.A. CGQT
State Street Bank and Trust Company SSBS
The Bank of New York – James Capel BONY
RBC Dominion Securities, Inc./CDS RBCF
NBCN Clearing, Inc./CDS NBCN
Barclays Capital Inc. BCAP
ABN AMRO Sage Corporation (California) SGCL

In addition to the above, click here to view a list of valid MPIDs published by FINRA.

If you use a clearing broker or custody agent which does not have an FINRA assigned MPID or an IB Assigned Location Code on the above list, click here to send an e-mail to IB to indicate the name of your clearing broker or custody agent and suggest a four letter code to indicate the location of the shares you have arranged to borrow for delivery in connection with your short sale order. IB will review your request to add the four letter code in lieu of a valid MPID.

Disclosures
  1. IB’s systems are configured to reject any short sale order that does not contain a valid MPID in FIX Tag 5700.
  2. If IB is also the customer’s clearing broker, FIX Tag 5700 will automatically be populated with IBKR, which is Interactive Brokers’ MPID.