Polymarket BTC Complete Set Strategies: Researching Up and Down Market Pricing

# Polymarket BTC Complete Set Strategies: Researching Up and Down Market Pricing

Polymarket BTC Up and Down markets contain two complementary outcome tokens. Researchers sometimes study whether buying both sides at a combined cost below the settlement value creates a structural pricing opportunity.

This type of analysis is often called complete-set research, paired inventory analysis, or Up and Down arbitrage research.

Understanding the Pair

In a binary market, the Up and Down outcomes are complementary. A complete set contains one token for each possible outcome. If the market rules settle one outcome at the defined value, the combined settlement value can be compared with the total acquisition cost.

A research model may calculate:

Combined Cost = Up Price + Down Price

The comparison should include:

• Bid and ask prices
• Quantity available
• Trading fees
• Spread
• Execution delay
• Partial fills
• Market resolution rules

A displayed combined price is not necessarily an executable combined price.

Why Inventory Becomes Directional

A strategy may attempt to buy both sides but fail to complete the pair. This creates residual directional inventory. If the BTC market moves before the second side is purchased, the bot may hold an unpaired token with exposure to the final outcome.

Researchers should track:

• Paired quantity
• Unpaired Up quantity
• Unpaired Down quantity
• Average cost
• Time to completion
• Market volatility
• Final settlement result

The percentage of paired and unpaired inventory can strongly affect results.

Complete-Set Backtesting

A historical Polymarket BTC complete-set backtest should process the two token order books independently. It should not assume that both sides can be purchased at the same time or at the same displayed price.

Important simulation rules include:

• Available size at each level
• Order arrival delay
• Sequential execution
• Partial fills
• Cancellation
• Spread crossing
• Fees
• Resolution handling

The strategy should be tested in both calm and high-volatility periods.

Market-Making and Residual Risk

Complete-set accumulation may overlap with passive market making. A bot can provide liquidity on one side while attempting to acquire the complementary side later.

This creates several risks:

• The second side may become more expensive.
• The market may move away before pairing.
• Liquidity may disappear.
• The residual position may lose value.
• The cost model may omit fees or adverse selection.

For this reason, a complete-set strategy should be analyzed as an inventory-management problem rather than a guaranteed arbitrage system.

Using Polymarket BTC Historical Data

The BTC dataset available from polytestdata.xyz contains resolved five-minute markets, complete order book snapshots, order book level changes, and executed trades. These records can support research into pair costs, inventory pairing, market making, and residual exposure.

Historical complete-set results do not guarantee future profitability. All analysis is for research and development and is not financial advice.