U.S. stock index futures pointed to a sharply higher open on Tuesday, recovering from the plunge seen in global stocks on Monday as mayhem in Chinese markets and interest rate fears dominated markets.

The New York Stock Exchange invoked Rule 48 for the second day in a row, Dow Jones reported.

The exchange used the rule before Monday's open after futures for several major averages hit limit down. The last time the rule was used was during the financial crisis.

What is Rule 48? The goal of Rule 48 is to ensure orderly trading amid financial market turbulence. It's only used in the event that extremely high market volatility is likely to have a floor-wide impact on the ability of designated market makers (DMMs) to disseminate price indications before the bell.

Unlike a circuit breaker that stops stock trading, Rule 48 speeds up the opening by suspending the requirement that stock prices be announced at the market open. Those prices have to be approved by stock market floor managers before trading actually begins. Without that approval, stock trading can begin sooner.

Dow futures briefly rose more than 600 points in premarket trading, implying a more than 450-point bounce at the open and shrugging off deeper selling in China's mainland stock market.

From: CNBC News



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