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Difficulty: Medium
Category: market_microstructure
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Topics: backtesting, transaction-costs, pnl-calculation, numpy
Accurate backtesting requires modeling transaction costs, often decomposed into linear components like bid-ask spreads and quadratic components representing market impact. These costs significantly affect the realized Profit and Loss (PnL) of a trading strategy, necessitating precise calculation methods for realistic performance evaluation. Task Implement the function solution(prices, positions, linear_impact, quadratic_impact) to calculate the cumulative Net PnL and Total Transaction Costs for
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