Why Market Orders in After Market Hours (AMO) Are Modified to Limit Orders

Market orders placed during After Market Hours are automatically converted to limit orders to protect against unfavorable price executions. Since market prices can fluctuate significantly before market open, this safeguard ensures trades aren't executed at extreme prices due to wide bid-ask spreads or low liquidity.

How It Works:
When you place a market AMO (e.g., to buy 500 shares of Reliance), it is modified into a limit order around 9:07 AM based on the price discovered in the pre-open session.

  • If liquidity permits, the order may get executed between 9:00 AM and 9:07 AM.

  • If not, it moves to the regular market session at 9:15 AM at the discovered price.

This mechanism balances flexibility with price protection, reducing the risk of poor execution from overnight market developments.

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