India’s contentious new closing auction system is about to face its biggest challenge yet as billions of dollars in passive-fund trades flow through it. The MSCI index rebalancing is expected to trigger a surge in trades that could overwhelm the system. Market participants are concerned that the auction mechanism, designed to improve price discovery, may instead lead to significant volatility and execution issues.

The Bloomberg Markets report highlights the potential for a "messy" outcome as the system is tested under real-world conditions with substantial capital movement.