A stock market crash is a sudden dramatic decline of stock prices across a significant cross-section of a stock market, resulting in a significant loss of paper wealth. Crashes are driven by panic as much as by underlying economic factors.
Even if different country has different market shares and economy, these markets are tightly correlated with each other. You must have heard of events when the US stock market crashes, the stock market Indiaalso experience the turbulence. Some stocks spike up the price and some lose stock rates.