Imagine you're the CFO of a large conglomerate like Tata Group, managing 10 different businesses — from salt to software. How do you decide where to invest more, where to milk profits, and where to quietly shut down? That's exactly the problem the BCG Growth-Share Matrix solves.
Developed by the Boston Consulting Group, this tool helps companies analyse their portfolio of Strategic Business Units (SBUs) — think of each SBU as a separate product line or division with its own market. The matrix plots each SBU on two axes: Market Growth Rate (vertical axis — how fast the overall market is expanding) and Relative Market Share (horizontal axis — your share divided by the largest competitor's share). The result is four quadrants, each with a memorable name.
Stars (High Growth, High Share) are the glamour businesses — growing fast and already dominant. They need heavy investment to maintain their lead, but they generate good returns too. Think of Jio in its early years. Cash Cows (Low Growth, High Share) are the real money-spinners — the market has matured, so you don't need to invest much, yet profits keep flowing. Hindustan Unilever's soaps business is a classic example. Use cash cows to fund your Stars and Question Marks. Question Marks (High Growth, Low Share) are the tricky ones — the market is booming, but your company hasn't grabbed a big slice yet. You face a strategic choice: invest aggressively to turn them into Stars, or exit before they drain cash. Dogs (Low Growth, Low Share) are stuck in a slow market with a weak position. The standard advice is to divest or harvest — squeeze out remaining cash without reinvesting, then exit.
The strategic logic flows naturally: Cash Cows → fund → Stars (to hold position) and Question Marks (to grow). Dogs are either sold off or wound down. This is called internal cross-subsidisation. This is asked frequently as a 4-mark or 6-mark question in Paper 6 SM, both for identification of quadrant and recommendation of strategy.