openpx_id | string | synthetic | synthetic | kalshi: Composite key \{exchange\}:\{ticker\}. polymarket: Composite key \{exchange\}:\{ticker\}. |
exchange | string | synthetic | synthetic | kalshi: Literal string "kalshi". polymarket: Literal string "polymarket". |
ticker | string | Market.ticker | Market.slug | kalshi: Native Kalshi market ticker. polymarket: Polymarket slug; stable, human-readable identifier (numeric id lives in numeric_id). |
numeric_id | string? | omitted | Market.id | kalshi: Kalshi has no separate numeric id surface. polymarket: Polymarket numeric DB id used for REST deep-links. |
event_ticker | string? | Market.event_ticker | synthetic | kalshi: Native Kalshi event ticker. polymarket: Read from the embedded events[0].slug (falls back to events[0].id). |
title | string | synthetic | Market.question | kalshi: Composed as \{yes_sub_title\} | \{no_sub_title\}. polymarket: Polymarket market question text. |
rules | string? | synthetic | Market.description | kalshi: Composed as \{rules_primary\} | \{rules_secondary\}. polymarket: Polymarket market description. |
status | MarketStatus | synthetic | synthetic | kalshi: Mapped from Kalshi’s status enum (initialized/active/closed/determined/…) to unified MarketStatus. polymarket: Combined from the active/closed/archived booleans into unified MarketStatus. |
market_type | MarketType | synthetic | synthetic | kalshi: Mapped from Kalshi’s market_type enum (binary/scalar) to unified MarketType. polymarket: Derived from outcomes.len() — binary if 2, otherwise categorical. |
outcomes | array | synthetic | synthetic | kalshi: Two entries (Yes/No); price computed from yes_ask_dollars/last_price_dollars. polymarket: Zipped element-wise from the stringified-JSON arrays outcomes, outcomePrices, clobTokenIds. |
condition_id | string? | omitted | Market.conditionId | kalshi: Kalshi has no CTF condition id. polymarket: On-chain CTF condition id. |
volume | number (double) | Market.volume_fp | Market.volumeNum | kalshi: FixedPointCount string parsed to f64 USD. polymarket: Lifetime volume in USD. |
volume_24h | number? (double) | Market.volume_24h_fp | Market.volume24hr | kalshi: FixedPointCount string parsed to f64 USD. polymarket: 24-hour volume in USD. |
last_trade_price | number? (double) | Market.last_price_dollars | Market.lastTradePrice | kalshi: Fixed-point dollar string parsed to YES probability in [0, 1]. polymarket: Already a YES probability in [0, 1]. |
best_bid | number? (double) | Market.yes_bid_dollars | Market.bestBid | kalshi: Fixed-point dollar string parsed to YES probability in [0, 1]. polymarket: Already a YES probability in [0, 1]. |
best_ask | number? (double) | Market.yes_ask_dollars | Market.bestAsk | kalshi: Fixed-point dollar string parsed to YES probability in [0, 1]. polymarket: Already a YES probability in [0, 1]. |
tick_size | number? (double) | Market.price_ranges | Market.orderPriceMinTickSize | kalshi: Smallest step across all tiers in the price_ranges array. polymarket: Single scalar tick size. |
min_order_size | number? (double) | synthetic | Market.orderMinSize | kalshi: 1.0 by default, 0.01 when fractional_trading_enabled. polymarket: Polymarket minimum order size in contracts. |
open_time | string? (date-time) | Market.open_time | Market.startDate | kalshi: RFC3339 string parsed to UTC. polymarket: ISO 8601 string parsed to UTC. |
close_time | string? (date-time) | Market.close_time | Market.endDate | kalshi: RFC3339 string parsed to UTC. polymarket: ISO 8601 string parsed to UTC. |
created_at | string? (date-time) | Market.created_time | Market.createdAt | kalshi: RFC3339 string parsed to UTC. polymarket: ISO 8601 string parsed to UTC. |
settlement_time | string? (date-time) | Market.settlement_ts | Market.closedTime | kalshi: RFC3339 string parsed to UTC. polymarket: On-chain settlement time, populated only after the market resolves. |
neg_risk | boolean? | omitted | negRisk (spec gap) | kalshi: Kalshi has no neg-risk concept. polymarket: Spec gap: negRisk is present on every live /markets row but undeclared on Market in the gamma OpenAPI. |
neg_risk_market_id | string? | omitted | negRiskMarketID (spec gap) | kalshi: Kalshi has no neg-risk concept. polymarket: Spec gap: present on every live /markets row but undeclared on Market in the gamma OpenAPI. |
result | string? | Market.result | synthetic | kalshi: Native Kalshi resolution enum string. polymarket: Winning outcomes[i] where outcomePrices[i] == 1.0 after settlement. |
