Guided issue-count lab
Net Advances revision lab
Choose a scenario, Step through causal evidence, and observe when the signed balance is supported—or correctly withheld.
Teaching stage
Preview the declared universe
What to notice nowThe initial view already shows the complete 12-listing synthetic roster. Step to apply the as-of gate.
Advances—
Declines—
Unchanged—
Excluded—
Unclassified—
A - D = —
Synthetic teaching fixture. Ticker is display-only; `listing_id` is the classification key.
Point-in-time member audit
| Listing ID | Security ID | Ticker | Current | Comparable prior | State / classification |
|---|
Halted and new/no-prior-close records remain visible as exclusions. A required missing price remains unclassified and makes the result incomplete.