A block allocation splits a trade executed for several accounts at once — a block for several funds — among them after execution, at the block’s average price, by a rule fixed before the trade that also decides where the units that do not divide evenly go.
| rule | fund A | fund B | fund C | residual | largest deviation |
|---|---|---|---|---|---|
| largest remainder | 4 900 | 3 000 | 2 000 | 0 | 50 |
| odd lots to the largest funds | 5 000 | 3 000 | 1 900 | 0 | 80 |
| each fund rounded | 5 000 | 3 000 | 2 000 | 50 |