# Will Trump nominate Stephen Hahn as FDA commissioner

> Closed. Last odds frozen 3 d ago — final outcome on the venue.

URL: https://simplefunctions.dev/odds/fdanom
Updated: 2026-08-20T19:20:53.068Z
Category: general · Topic: trump
Status: historical
Closes: 2029-01-20

## Headline

- Probability: 49% (liquidity-weighted across 2 contracts)
- Venue: Kalshi (2 contracts)
- 24h volume: $3K

## Bound contracts (2)

| Outcome | Price | 24h | Volume | Venue | Slug |
|---|---|---|---|---|---|
| Heidi Overton | 94¢ | +60pp | $3K | kalshi | /markets/will-trump-nominate-heidi-overton-as-fda-commissio-kalshi-kxfdanom-29-hove |
| Stephen Ferrara | 3¢ | −5pp | $201 | kalshi | /markets/will-stephen-ferrara-be-nominated-for-fda-commissi-kalshi-kxfdanom-29-sfer |

## 30-day trajectory

| Day | Aggregate |
|---|---|
| 2026-07-27 | 9 |
| 2026-08-10 | 14 |
| 2026-08-17 | 11 |
| 2026-08-19 | 41 |

_12 days of price history captured. Each row is the daily mean of intraday 5-min captures._

## What moved the line

- 2026-08-19 · Heidi Overton +60pp 18→78¢ · kalshi
- 2026-08-19 · Stephen Ferrara −5pp 8→3¢ · kalshi
- 2026-08-17 · Heidi Overton +4pp 12→16¢ · kalshi

## Analysis

This market measures the likelihood that President Trump will nominate Stephen Hahn as FDA commissioner during his current administration. Hahn, a former FDA commissioner under Trump (2019-2021), is currently considered a lower-probability candidate compared to Kyle Diamantas, who leads at 28%. The market pricing reflects uncertainty about Trump's final nomination decision, which remains unmade. Key drivers of Hahn's relatively lower probability include active competition from other candidates receiving higher trading interest, the FDA commissioner role's prominence making it difficult to predict Trump's preference among multiple qualified contenders, and limited recent public signals about Hahn's interest or Trump's intentions toward him specifically. The outcome will be definitively resolved once Trump formally nominates and announces a candidate—an event with no confirmed timeline but typically occurring within the first few months of a presidency. Until then, traders are pricing in base rates of FDA candidate viability alongside any available reporting about candidate positioning.

### Key factors

- Hahn's 28% probability ranks below the leading candidate (Kyle Diamantas at 28%) and significantly above mid-tier candidates like Mehmet Oz (14%), suggesting moderate but not primary consideration among contract participants
- No scheduled announcement date has been publicly confirmed for Trump's FDA commissioner nomination, creating open-ended uncertainty that may persist for months
- Hahn previously served as FDA commissioner (2019-2021), providing track record and familiarity that could either support or disfavor a second nomination depending on Trump's assessment
- Trading volume across most contracts remains minimal ($0 24h volume on six of seven listed candidates), indicating thin liquidity and potentially unrepresentative pricing
- The multi-outcome structure means Hahn must compete against six other named candidates plus potential unlisted nominees, with limited information about Trump's actual preference distribution

## Methodology

Probability is **liquidity-weighted** across all bound Kalshi/Polymarket contracts: Σ(price × volume) ÷ Σ(volume). 30-day trajectory uses the daily mean of intraday 5-min captures. 24h delta = today's mean − yesterday's mean. Movement events are ≥3pp daily moves in the last 7 days.

## How to use this data

- HTML: https://simplefunctions.dev/odds/fdanom
- JSON: https://simplefunctions.dev/api/public/odds?slug=fdanom
- Topic hub: https://simplefunctions.dev/predictions/trump

## License

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