Trade: Will Pope Leo XIV publish his encyclical by May 15?
Resolution criteria on PolyGram: This market will resolve to "Yes" if Pope Leo XIV publishes his encyclical by May 15, 2026, 11:59PM ET. Otherwise, this market will resolve to "No". For a letter to qualify it must be commonly understood as an encyclical or declared as an encyclical upon release. Other forms of papal brief, such as a papal bull, will not qualify. The resolution source for this market will be information from Pope Leo XIV, official information from the Catholic Church, or a consensus of credible reporting.
PolyGram is an on-chain prediction market where you trade YES or NO outcome shares with real USDC on Polygon. For this market, buy YES if you believe the event will happen, or NO if you think it won't. Your maximum loss is your stake — winning shares pay $1.00 each at resolution. Unlike sportsbooks, there is no house edge: prices are set by supply and demand from other traders and reflect the crowd's real-time probability.
- Liquidity
- $593
- Total Volume
- $1K
- 24h Volume
- $125
- Open Interest
- $443
Market outcomes
| Will Pope Leo XIV publish his encyclical by May 15? | 87% YES | 14% NO |
Market context
Pope Francis remains in office as of early 2025, making the premise of this market speculative fiction. However, the market structure assumes a successor, Pope Leo XIV, will issue a formal encyclical within approximately 16 months of the settlement window opening. The current order book on Polymarket reflects a 77% implied probability, suggesting traders assess publication as more likely than not within this timeframe.
Historical precedent provides limited guidance for predicting encyclical publication timelines under hypothetical succession scenarios. Pope Francis has issued encyclicals irregularly—*Laudato Si'* in 2015 and *Fratelli Tutti* in 2020—with gaps reflecting the pontiff's priorities and health circumstances rather than fixed schedules. A new pope typically issues foundational documents early in their tenure to establish doctrinal direction, though the timing varies considerably. John Paul II published *Redemptor Hominis* within months of his 1978 election, whilst Benedict XVI waited over a year for *Deus Caritas Est*.
Traders monitoring this market should track papal health announcements, Vatican communications schedules, and any statements from cardinals regarding succession timelines. The May 2026 deadline provides a defined window, but encyclical publication depends on factors outside predictable schedules: the new pontiff's health, the urgency of doctrinal priorities, and internal Vatican deliberation processes. Recent reporting on papal succession planning remains speculative, with no confirmed timeline for transition. The 77% probability reflects optimism about relatively prompt publication following a hypothetical change in leadership, though encyclical authorship and vetting typically require months of preparation.
Wikipedia Context
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Pope Leo XIVPope Leo XIV is the head of the Catholic Church and sovereign of Vatican City. He is the first pope to have been born in the United States, the first to hold either U.S. or Peruvian citizenship, the first from the Order of Saint Augustine, and the second from the Americas.
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Pope Leo XIIIPope Leo XIII was head of the Catholic Church from 1878 until his death in 1903. He had the fourth-longest reign of any pope, behind those of St. Peter, Pius IX, and John Paul II.
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Pope Leo XPope Leo X was head of the Catholic Church and ruler of the Papal States from 9 March 1513 to his death in December 1521.
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Pope Leo IPope Leo I, also known as Leo the Great, was Bishop of Rome from 29 September 440 until his death on 10 November 461. He is the first of the three Popes listed in the Annuario Pontificio with the title "the Great", alongside Popes Gregory I and Nicholas I.
How this market resolves
Resolution is handled by the UMA optimistic oracle on Polygon. A proposer submits the outcome, a two-hour dispute window opens, and if no one stakes a counter-claim the payout is final. Contested outcomes escalate to UMA token-holder voting. Payouts clear in USDC to the winning side.
How to trade this market step by step
The mechanics for trading "Will Pope Leo XIV publish his encyclical by May 15?" are the same as any other PolyGram event contract. Each YES share resolves to $1 if the event happens, or $0 if it doesn't. The current price between 0¢ and 100¢ is the market's probability estimate, set live by the order book.
- Sign in on polygram.ink with your email — no full KYC under $1,500 lifetime trading volume.
- Deposit USDC on Polygon (lowest fees, ~$0.01 per transaction) or Ethereum. Funds credit after 12 confirmations.
- Pick a side. Buy YES if you believe the event will happen; buy NO if you think it won't. The current YES price reflects the market's collective probability.
- Size your position. If you stake 100 USDC at 87% YES, you'll receive shares that pay $115 if YES resolves true — a 15% gross return. If NO resolves, your shares are worth $0.
- Set risk controls (optional). Stop-loss, take-profit, and limit-order types all supported. Use the trade ticket's slippage box to cap your maximum entry price.
- Wait for resolution. When the event resolves on-chain via the UMA optimistic oracle, the winning side settles to 100¢ automatically and USDC hits your balance within seconds. Withdrawable to any wallet you control.
How active is this market?
$1K in lifetime turnover and $593 of resting liquidity puts this market in the below the median by volume for pop culture contracts on PolyGram. Order-book depth is thin — large orders may need to be split across the book or executed as limit orders.
Last 24 hours alone saw $125 in turnover, well above the lifetime daily-average for this market — a clear sign of news catalysing trader activity right now.
The market has been open for around a month — fresh enough that information asymmetry remains a real factor.
Higher-volume markets tend to have tighter spreads and faster price discovery — meaning the displayed YES/NO percentages are more likely to reflect the true crowd-implied probability rather than a single trader's directional view.
Key terms
- YES / NO share
- A binary outcome token that pays $1.00 if the underlying claim resolves true (YES) or false (NO), and $0 otherwise. The market price between 0¢ and 100¢ is the implied probability.
- CLOB
- Central limit order book. The matching engine that pairs YES buyers with NO buyers (effectively the same trade). Polymarket's CLOB on Polygon executes trades on-chain via the conditional-tokens framework.
- Liquidity
- USDC capital sitting in resting limit orders inside the order book. Deeper liquidity means smaller slippage on large trades and a tighter bid-ask spread.
- UMA optimistic oracle
- The on-chain dispute system that settles each Polymarket market. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution.
- Slippage
- The difference between the displayed mid-price and your fill price. Affects market orders most; limit orders avoid slippage but may take time to fill.
- Conditional token
- ERC-1155 outcome share issued by Gnosis Conditional Tokens on Polygon. The token type that resolves to $1.00 or $0.00 at settlement.
Frequently asked questions
What is the current probability for "Will Pope Leo XIV publish his encyclical by May 15?"?
As of today, traders on Polymarket price this outcome at 87%. The number updates continuously as the order book clears. PolyGram mirrors the same live odds with locale-aware formatting and USDC settlement.
How does this market resolve?
Resolution is handled by the UMA optimistic oracle on Polygon. A proposer submits the outcome, a 2-hour dispute window opens, and if uncontested the payout is final. Contested outcomes escalate to UMA token holders.
When does this market close?
This prediction market is scheduled to close on 15 May 2026. After the resolving event occurs, settlement typically clears within 24 hours once the UMA optimistic oracle confirms the outcome. All payouts are in USDC on the Polygon network.
How can I trade on "Will Pope Leo XIV publish his encyclical by May 15?"?
To trade on this prediction market, create a free PolyGram account at polygram.ink, deposit USDC via Polygon, and place a YES or NO order on the outcome you believe in. You can learn more on our how-it-works page. Your maximum loss is limited to your stake — there is no leverage or margin.
What happens when the market resolves?
When the outcome is determined, winning YES shares pay out $1.00 each in USDC, while losing shares pay $0. Settlement is handled by the UMA optimistic oracle on Polygon — a proposer submits the result, a two-hour dispute window opens, and if uncontested, payouts are distributed automatically. You can withdraw your winnings to any Polygon wallet.
Risk and regulatory note
Prediction-market positions can lose 100% of staked capital. Outcomes are uncertain by definition — historical accuracy of crowd-implied probabilities is high in aggregate but not for any single market. PolyGram does not provide investment advice. Trade only with capital you can afford to lose.
Regulatory status varies by jurisdiction. Germany, the United States, and most EU countries treat Polymarket-style event contracts under one of three frameworks: financial derivative, gambling product, or unregulated novel asset. Consult local counsel before trading.
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