On Thursday, the KSE-100 index fell by 2,006.67 points, or 1.21 percent, to close at 163,924.31. A fall of two thousand points sounds dramatic, but a simple question explains much of it: which sectors fell? The answer on Thursday was mainly commercial banks, with cement shares also weak.
To understand the stock market, it helps to understand its heavyweights.
Not Every Share Counts Equally
The KSE-100 is an index — a single number that summarises the movement of the one hundred selected companies. But it is not a simple average. Each company carries a weight based largely on its market capitalisation, which means the total market value of its shares. A very large bank can move the index more with a small price change than dozens of small companies moving together.
That is why market reports often say that banks “led” a fall or a rise. In Pakistan, commercial banks are among the largest listed companies. Energy companies, especially oil and gas exploration and marketing firms, and large cement producers also carry heavy weight. Fertiliser and technology companies matter too, but day after day, the headline number is usually decided by these few big groups.
On Thursday, Engro Holdings — listed as ENGROH — was the biggest single drag on the index, while Unilever Pakistan Foods, UPFL, was the biggest positive contributor. One heavy share pulling down and one pulling up shows the tug of war that happens inside the index every day.
Why Banks React So Quickly
Banks sit at the centre of the money system. Interest rate expectations, government borrowing, and the health of business loans all affect their profits directly. With the State Bank’s policy meeting due on Monday, 26 October, and oil prices raising inflation concerns, bank shares were an easy target for sellers on Thursday.
Cement shares have a different weakness. Cement companies use large amounts of energy and transport, so expensive oil raises their costs. They also depend on construction activity, which slows when interest rates are high and borrowing is expensive. When both worries appear together, cement shares often come under pressure at the same time as banks.
Energy shares, by contrast, can benefit when oil rises, because exploration companies may earn more from higher prices. That balancing effect is one reason the index does not always fall as much as the bad news might suggest.
What the Breadth Tells Us
The wider market confirmed Thursday’s weakness. In the ready market, only 101 companies gained, while 355 fell and 38 were unchanged, out of 494 traded. When losers outnumber gainers by more than three to one, the fall is broad, not limited to one or two names. Market capitalisation stood at about Rs 18.17 trillion, with 367.09 million shares traded for a value of about Rs 18 billion.
For an ordinary reader, the lesson is practical. When you see the index move sharply, look past the headline and ask which heavyweight sectors moved, and why. Most days, banks, energy, and cement will give you most of the answer. The index is not the whole market — it is mainly a story of its biggest companies, written in one number.
Market data: Pakistan Stock Exchange, State Bank of Pakistan and published news reports (figures as of 22 October 2026). Written in our own words for information only — not investment advice.