The side of this individual leg (multileg security).
See Side (54) field for description and values
Valid values:
| '1' | Buy |
| '2' | Sell |
| '3' | BuyMinus |
| '4' | SellPlus |
| '5' | SellShort |
| '6' | SellShortExempt |
| '7' | Undisclosed |
| '8' | Cross |
| '9' | CrossShort |
| 'A' | CrossShortExempt |
| 'B' | AsDefined |
| 'C' | Opposite |
| 'D' | Subscribe |
| 'E' | Redeem |
| 'F' | Lend |
| 'G' | Borrow |
| 'H' | SellUndisclosed |
Used in: