Liquidity Depth & Spread Analysis

Overview

This pillar analyzes the order book's depth and bid-ask spread to determine the stability and reliability of a political market's price. It helps distinguish between flimsy odds and prices backed by significant capital.

What It Does

It quantifies the market's underlying structure by examining the gap between buy and sell orders, the volume of capital at various price levels, and the potential price impact of a large trade. This process reveals how much money is actively supporting the current odds, providing a clear picture of market conviction.

Why It Matters

A market with low liquidity can have misleading prices that are easily manipulated or subject to wild swings. This pillar provides a crucial risk management tool, helping you identify fragile odds and avoid markets that lack genuine, broad-based support.

How It Works

First, the pillar ingests live order book data from the prediction market. It then calculates the percentage spread between the highest bid and lowest ask. Finally, it measures the cumulative volume of orders within a set percentage of the current price to model depth and potential slippage.

Methodology

The Bid-Ask Spread is calculated as ((Lowest Ask - Highest Bid) / Mid-Price) * 100. Market Depth is measured by summing the total value of buy orders within 5% of the market price and sell orders within 5%. Slippage is estimated by calculating the average execution price of a hypothetical $10,000 trade.

Edge & Advantage

This analysis lets you see 'behind' the price, identifying markets where the odds are weakly supported and vulnerable to sharp reversals.

Key Indicators

• Bid-Ask Spread

  high

  Measures the gap between the highest price a buyer will pay and the lowest price a seller will accept. A narrow spread indicates high agreement and liquidity.

• Order Book Depth

  high

  The total volume of open buy and sell orders. Deep order books signify a stable market that can absorb large trades without significant price changes.

• Slippage Estimate

  medium

  The predicted percentage change in price if a large, standardized trade (e.g., $10,000) were to be executed immediately.

Data Sources

• Prediction Market APIs

  Provides real-time order book data, including bid and ask prices and their corresponding volumes, directly from the exchange.

Example Questions This Pillar Answers

• → How stable are the odds on a candidate winning the presidential election?
• → Is the current price on a polling market supported by significant volume, or is it easily moved?
• → Does the market for 'Party to Control the Senate' show more conviction than the market for the House?

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