Why did the Nifty and the Sensex crash so sharply on 13 November?

Why did the Nifty and the Sensex correct so sharply on Monday?

Why did the Nifty and Sensex rally so sharply on Wednesday despite the rupee being so weak?

Why did the Nifty and the Sensex correct so sharply? Was it a reaction to the Trump announcement?

Why have Nifty and Sensex crashed so sharply in this week? What exactly is wrong with the market condition?

Why did the Nifty and the Sensex fall so sharply on 29 November?

Why was the Sensex and Nifty up so sharply on 13 December despite the negative IIP numbers?

Why did media shares like Sun TV and Zee Entertainment fall so sharply on 13th November in the stock market?

Why did the Nifty and Sensex bounce back sharply on Friday 26th April 2019?

Why did the markets bounce back so sharply from lower levels; both the Nifty and the Sensex? Is this a sign that market has bottomed out?

Why did the Nifty and Sensex correct sharply? I thought they should have gone up after the announcements last week.