BSE/NSE Timings due to Solar Outage

Change in Trading Timings of Mumbai Stock Exchange and National Stock Exchange.
Starting From Tuesday, 4th March 2008
Ending on Tuesday, 18th March 2008.
Start trading at 9.55 am .Stop trading at 11:45am. Resume Trading at 12.30pm. Stop Trading at 4.15 pm IST.

Source : a stock exchange circular .

A sun outage is a distortion of geostationary satellite signals caused by interference from solar radiation. Generally, sun outages occur during February, March, September and October. The effects of a sun outage can include partial degradation, an increase in the error rate, or total destruction of the signal.

Both the BSE and NSE use VSATs (Very Small Aperture Terminal) for members to connect to their trading systems. Both the bourses get affected by sun outage as VSATs depend upon satellites for connectivity between the terminals or systems.

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