Clarity Act Odds on Polymarket: The Warren Selloff

Sen. Cynthia Lummis has warned that if the Digital Asset Market Clarity Act does not pass this Congress, the next realistic shot at crypto market-structure legislation will not come until 2030. That's the backdrop for the Senate's cloture vote on the bill, set for 2:15pm ET (18:15 UTC) on September 15, 2026. Polymarket's "Clarity Act (H.R.3633) signed into law in 2026?" contract spiked to a 34.5c high early Monday morning on compromise text Republicans released Sunday night, then crashed to a 15.5c low Monday evening after Sen. Elizabeth Warren's floor speech attacking the bill, settling at 18.5c as of 2026-09-15 11:55 UTC.

What the cloture vote actually decides

The Digital Asset Market Clarity Act, H.R. 3633, would split regulatory authority over digital assets between the SEC and the CFTC - the framework crypto exchanges have wanted since the SEC's enforcement-led approach of the early 2020s. It already cleared the House once, passing 294-134 on July 17, 2025, before the Senate had written its own version. The Senate Banking Committee advanced its draft 15-9 on May 14, 2026, with only two Democrats voting yes, and it has sat without a floor vote since, while Majority Leader John Thune worked to find the 60 votes cloture requires - a threshold Republicans can't clear with their own seats alone.

Cloture is the Senate's procedure for cutting off debate on a bill; a successful cloture vote doesn't pass the bill, it just ends the filibuster and lets the floor move toward a final vote. The September 15 vote is cloture on the motion to proceed, one step further back - opening debate at all. Two provisions are doing most of the blocking. Banks want Section 404's stablecoin-yield ban tightened, warning that interest-like payments on stablecoins would pull deposits into high-yield crypto accounts. Democrats want stronger ethics language after Section 604's DeFi-developer-liability carve-outs and a narrow conflict-of-interest clause left most of the caucus opposed. Republican sponsors released updated text late Sunday, September 13, calling it their final offer on both fronts.

A round trip inside 36 hours

Warren, the Banking Committee's ranking member, used a Monday floor speech to call the new ethics language a "weak fig leaf" that "will do nothing to stop [Trump] from making his next $1.4 billion in crypto profits" - a reference to the president's personal crypto holdings. Polymarket's contract had already been drifting down off its overnight high through Monday, holding a 27.5-32.5c band for most of the day; it broke decisively lower starting around 21:00 UTC as Warren's remarks circulated, falling from 22.5c to a 15.5c low by 22:50 UTC - a 7-point drop in under two hours, on top of the 12 points it had already given back since the morning peak. It ticked back up to a 17.5-21c range overnight and has held there into Tuesday morning.

An 18.5c bet on the whole chain, not just today's vote

CLARITY ACT SIGNED IN 2026     YES
Last                             18.5c
Bid                          18c x 13,312
Ask                          19c x 10,507

The order book is a tight 1c wide: 13,312 shares bid at 18c against 10,507 offered at 19c (the No side mirrors it exactly - 10,507 bid at 81c, 13,312 offered at 82c, since Yes and No are the same contract priced from opposite sides). The event has traded $1.2M over the past 24 hours against $344,512 of resting liquidity, both solidly above what this blog treats as a thin book. That 18.5c doesn't price the cloture vote in isolation - it prices the whole chain: cloture, then full Senate passage, then squaring the Senate's text with the House-passed version by House concurrence or a conference report, then a signature, all inside 2026. A senator can vote yes on cloture and still vote no on final passage days later, so even a clean 60-vote cloture win would likely move this contract without resolving it outright.

What today's roll call moves next

The cloture vote itself is the next data point, expected shortly after 18:15 UTC on September 15. A win clears the immediate procedural hurdle and opens formal debate; a loss - with Lummis's 2030 warning hanging over it - would land close to a resolution in itself, and the order book already shows a market that isn't fully confident either way. Legislative votes like this move in minutes once the roll call starts, which is what a live order book is for: polymarket-tui keeps the book and the price chart on one screen, so a cloture vote that flips a contract 10 points in five minutes shows up as it happens, not as a headline read after the fact.

$ uv tool install polymarket-tui
$ polymarket-tui

No account is needed to browse markets, books, and charts. The install page has Homebrew and one-liner options.