| Code | Meaning | Code (Cont.) | Meaning (Cont.) | 
| A | Assignment | LI | Last In, First Out (LIFO) tax basis election | 
| AEx | Automatic exercise for dividend-related recommendation. | LT | Long Term P/L | 
| Adj | Adjustment | Lo | Direct Loan | 
| Al | Allocation | M | Entered manually by IB | 
| Aw | Away Trade | MEx | Manual exercise for dividend-related recommendation. | 
| B | Automatic Buy-in | ML | Maximize Losses tax basis election | 
| Bo | Direct Borrow | MLG | Maximize Long Term Gain tax basis election | 
| C | Closing Trade | MLL | Maximize Long Term Loss tax basis election | 
| CD | Cash Delivery | MSG | Maximize Short Term Gain tax basis election | 
| CP | Complex Position | MSL | Maximize Short Term Loss tax basis election | 
| Ca | Cancelled | O | Opening Trade | 
| Co | Corrected Trade | P | Partial Execution | 
| Cx | Part or all of this transaction was a Crossing executed as dual agent by IB for two IB customers | PI | Price Improvement | 
| ETF | ETF Creation/Redemption | Po | Interest or Dividend Accrual Posting | 
| Ep | Resulted from an Expired Position | Pr | Part or all of this transaction was executed by the Exchange as a Crossing by IB against an IB affiliate and is therefore classified as a Principal and not an agency trade | 
| Ex | Exercise | R | Dividend Reinvestment | 
| G | Trade in Guaranteed Account Segment | RED | Redemption to Investor | 
| HC | Highest Cost tax basis election | Re | Interest or Dividend Accrual Reversal | 
| HFI | Investment Transferred to Hedge Fund | Ri | Reimbursement | 
| HFR | Redemption from Hedge Fund | SI | This order was solicited by Interactive Brokers | 
| I | Internal Transfer | SL | Specific Lot tax basis election | 
| IA | This transaction was executed against an IB affiliate | SO | This order was marked as solicited by your Introducing Broker | 
| INV | Investment Transfer from Investor | SS | Customer designated this trade for shortened settlement and so is subject to execution at prices above the prevailing market | 
| L | Ordered by IB (Margin Violation) | ST | Short Term P/L | 
| LD | Adjusted by Loss Disallowed from Wash Sale | T | Transfer |