Which of the following stock exchanges is popularly known by the nickname \"Big Board\" in financial markets?

Introduction / Context:
Many major stock exchanges around the world have nicknames or informal titles used by traders and the media. Knowing these nicknames is a useful part of financial and business awareness. The term \"Big Board\" is one such nickname that refers to a particular stock exchange where many of the world's leading corporations are listed.

Given Data / Assumptions:

• We are asked which stock exchange is called the \"Big Board\".
• Options: Nasdaq, London Stock Exchange, New York Stock Exchange, Mumbai Stock Exchange.
• We assume globally accepted financial terminology.

Concept / Approach:
The New York Stock Exchange (NYSE) is commonly and historically referred to as the \"Big Board\". It is famous for floor-based trading and its long history on Wall Street. While Nasdaq, London Stock Exchange, and the Bombay or Mumbai Stock Exchange are major exchanges, they do not share this specific nickname. The correct approach is to recall which exchange is associated with the Wall Street trading floor and the \"Big Board\" moniker.

Step-by-Step Solution:
Step 1: Remember that the New York Stock Exchange is the oldest and most traditional of the US stock exchanges, known for its trading floor and iconic building. Step 2: The nickname \"Big Board\" reflects both its size and central role in the global financial system. Step 3: Nasdaq, in contrast, is known as an electronic exchange and is not usually called \"Big Board\". Step 4: The London Stock Exchange is sometimes called LSE or referred to by its location, but not by the name \"Big Board\". Step 5: The Mumbai or Bombay Stock Exchange is called BSE or Dalal Street, again not \"Big Board\". Step 6: Therefore, select New York Stock Exchange as the correct answer.

Verification / Alternative check:
Financial textbooks, business newspapers, and even popular media frequently describe the NYSE as the \"Big Board\". It is a standard piece of terminology, and many exam question banks repeat this Q and A pair exactly. Cross-checking with multiple sources confirms that this nickname uniquely applies to the New York Stock Exchange among the options given.

Why Other Options Are Wrong:
Nasdaq: Known for high technology listings and its electronic trading model, but its common nickname is simply Nasdaq, not \"Big Board\". London Stock Exchange: A major global exchange associated with the City of London but not with this particular nickname. Mumbai Stock Exchange: Also called BSE and associated with Dalal Street, but not popularly called \"Big Board\".

Common Pitfalls:
Some candidates may misinterpret \"Big Board\" as referring to the largest exchange by number of technology listings and mistakenly choose Nasdaq. Others may think of regional importance and pick Mumbai Stock Exchange. To avoid confusion, it helps to associate NYSE with floor trading images, the ringing of the bell, and the term \"Big Board\" as part of financial market culture.

Final Answer:
The stock exchange popularly known as the \"Big Board\" is the New York Stock Exchange.