Ticker Format

Gemini prediction markets use structured ticker symbols to uniquely identify events and contracts. Tickers are used throughout the prediction markets API for:

• Querying markets - Retrieve market data by ticker
• Placing orders - Specify which contract to trade
• Position tracking - Identify holdings in your portfolio
• Market data feeds - Subscribe to updates for specific contracts

The format varies based on the market type.

Ticker Formats by Market Type

Crypto Tickers

Crypto prediction tickers follow the format:

Code
 
GEMI-{Underlying}{Expiry}-{Contract}

• Underlying: Crypto asset (BTC, ETH, SOL, etc.)
• Expiry: UTC datetime as YYMMDDHHmm
• Contract: Price threshold (e.g., HI105000 for > $105,000)

See Crypto Ticker Format for full specification.

Sports Tickers

Sports prediction tickers follow the format:

Code
 
GEM-{LEAGUE}-{YYMMDD}{HHMM}-{AWAY}-{HOME}-{TYPE}-{CONTRACT}

• League: Sport league code (NBA, NFL, EPL, etc.)
• DateTime: Game start time in UTC
• Teams: Away and home team abbreviations
• Type: Market type (M=Moneyline, S=Spread, T=Total)
• Contract: Position within the market

See Sports Ticker Format for full specification.