What do 52-week high and 52-week low mean? What is a market index like the Nifty 50 or Sensex? What is a portfolio, and why should I diversify? What is a stock exchange, and what are the NSE and BSE? What is a stock (or share)? What is an ETF (Exchange Traded Fund)? What is an ISIN, and how is it different from a trading symbol? What is free float, and why does it matter? What is liquidity in the stock market? What is market capitalisation, and what are large-cap, mid-cap and small-cap stocks? What is the face value of a share? What is volatility, and what is India VIX? Why do stock prices move up and down?