Definition
Transaction Cost Analysis (TCA)
Transaction Cost Analysis is the post-trade measurement of execution quality, comparing realised fill prices against benchmarks such as arrival price or VWAP to quantify explicit and implicit costs.
Indian institutions and large brokers run TCA to grade their dealing desks and execution algos. It decomposes total cost into commissions, taxes (STT, stamp duty), spread, market impact and timing, and reports performance versus benchmarks like VWAP and the arrival price.
TCA closes the feedback loop: if an algo consistently underperforms its benchmark, the desk recalibrates participation rates or switches strategies. Regulators and trustees also use TCA-style evidence to assess best execution obligations, making it a governance tool as much as a performance one.
Related terms
- VWAP (Volume Weighted Average Price)VWAP is the average price of a security over a period weighted by traded volume, used both as an execution benchmark and as the target for an algorithm that trades in proportion to historical volume.
- Implementation ShortfallImplementation shortfall is the difference between the price of a stock when the decision to trade was made (the arrival or decision price) and the actual average price achieved, including all explicit and implicit costs.
- SlippageSlippage is the difference between the expected price of a trade and the price at which it is actually executed, arising from market movement, spread and limited liquidity between order placement and fill.
- Best ExecutionBest execution is the obligation on a broker or fund to take all reasonable steps to obtain the most favourable terms for a client's order, considering price, cost, speed, likelihood of execution and settlement.
Plain-English explainer from The Dispatch Investors Encyclopedia. General information, not financial advice.