2026-21652NoticeWallet

NYSE Brings Back Rule 123D—Just to Mark It Reserved

Published Date: 10/23/2026

Notice

Summary

The New York Stock Exchange is bringing back its old Rule 123D but marking it as 'Reserved,' meaning it’s there but not active. This change affects traders and market watchers by keeping the rulebook tidy without changing trading halt procedures. The update took effect right away in October 2026, with no new costs or delays involved.

Analyzed Economic Effects

2 provisions identified: 2 benefits, 0 costs, 0 mixed.

Former Rule 123D Restored as 'Reserved'

If you are a trader, member firm, or market watcher, the NYSE put back the title for former Rule 123D in its rulebook and marked it "Reserved." The Exchange also restored the rule's adoption and amendment history so the rule's legacy and development are preserved.

Change Effective Immediately upon Filing

The NYSE's filing was effective upon filing on October 6, 2026, because the SEC waived the normal 30-day operative delay. That immediate effectiveness provided member organizations prompt clarity about the rulebook change.

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Key Dates

Effective Date
Published Date
10/6/2026
10/23/2026

Department and Agencies

Department
Independent Agency
Agency
Securities and Exchange Commission
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