Will the Surface Transportation Board issue its final decision on the Union Pacific–Norfolk Southern merger before 30 June 2027?
deadline 2027-06-30
confidence medium
tier 4 evidence
61%PolySignal estimate
⚠ Evidence cap applied: the model proposed 68%, brought back to 61% for lack of sources solid enough to justify the departure from the base rate.
Resolution criterion
Yes if the U.S. Surface Transportation Board issues (serves) its final decision on the Union Pacific–Norfolk Southern control application (approval, approval with conditions, or denial) on or before 30 June 2027, as shown on the STB docket or its press release. Procedural orders, schedule changes or partial decisions do not count.
Verified starting state
The STB issued a new procedural schedule on 18 August 2026 after a refiling: DOJ and DOT preliminary comments due 3 December 2026, responses and protests due 16 February 2027, public comment on the environmental review expected after 29 March 2027, and a final decision expected in the second quarter of 2027 if the schedule holds. A public hearing is unlikely before March 2027. The schedule has already been reset once.
What pushes it up
- The STB’s procedural schedule (hand‑verified tier 1) sets a final decision for Q2 2027, i.e., before 30 June 2027 [tier 1]
- Union Pacific CEO publicly expressed high confidence the merger will be approved, suggesting momentum [tier 4]
What pushes it down
- The schedule has already been reset once, indicating possible further delays [tier 1]
- Multiple rail unions have publicly opposed the merger, which could generate additional protests or legal challenges [tier 4]
What would move this number most
Whether the STB will adhere to the Q2 2027 deadline or experience another schedule reset
How this number is built
| Deadline | 2027-06-30 |
| Base rate | 55% |
| Best evidence | tier 4 · 2 article(s) used |
| Independent runs | 58 · 63 (spread 5 pts) |
| Confidence | medium |
| Evidence cap | applied: 68% brought back to 61% |
| Last revised | 2026-10-14 14:44 |
| Model | openai/gpt-oss-120b (Groq) |
Sources consulted