KARACHI: On most trading days, the Pakistan Stock Exchange is really a banking index wearing a disguise. Banks routinely make up around a quarter or more of the KSE-100's weight, which means the "market" often goes wherever bank shares go. Understanding why — and how banks actually earn — is essential PSX literacy.
Why banks are the index heavyweight
Banks dominate for a structural reason: Pakistan's biggest, most profitable listed companies are banks. Institutions like HBL, UBL, MCB and their peers combine huge market capitalisations with high trading liquidity, so index methodology naturally gives them the largest weights. When foreign investors buy "Pakistan," they mostly buy banks. The flip side: a banking selloff can sink the index even while the rest of the market holds up.
How Pakistani banks actually make money
A bank's core profit is the spread — the gap between what it pays depositors and what it earns lending or investing. In Pakistan, a huge share of bank earnings comes not from lending to businesses but from investing deposits in government securities (T-bills and PIBs). This makes bank profits deeply tied to interest rates: high rates generally fatten spreads and boost earnings, which is why bank shares often rally when the State Bank holds rates high — the opposite of most other sectors.
What to watch: bad loans and spreads
The two numbers that matter most in a bank's results are the non-performing loan (NPL) ratio — the share of loans gone bad — and the net interest margin. Rising NPLs mean the bank must set aside provisions, which eat profits directly. Also watch the advance-to-deposit ratio: banks that lend too little are essentially bond funds in disguise, and their fortunes swing with government borrowing rather than economic growth. Quarterly results season, when all major banks report within days of each other, routinely sets the market's tone.
The risks nobody mentions at dinner parties
Bank dividends look generous, but they are hostage to regulation: the State Bank can restrict payouts, and windfall taxes on banking profits have appeared before and can appear again. Concentration is the other risk — if your "diversified" portfolio is five bank shares, you own one bet on interest rates five times over. Banks deserve a place in most PSX portfolios; they just should not be the portfolio.
Key takeaway: banks are the KSE-100's engine room because they are big, liquid and rate-sensitive. Own them with open eyes about regulation and concentration.
