If you have ever watched a high-priced stock barely budge despite heavy trading interest, the Nigerian Exchange has just rewritten the rule that caused that frustration. The change does not touch what you pay for a share. It changes how much trading it actually takes to move the price you see.

The latest amendment marks a return to a graduated structure similar to the market microstructure framework the exchange introduced in 2018, when equities were grouped according to their price levels and subjected to different volume thresholds for price movements. Under the amended Rule 15.29 of the NGX Rulebook, equities will now be classified into three groups based on their share prices, with different trading volume requirements needed to alter their published market prices.

Stocks priced at ₦1,000 and above will require a minimum of 10,000 shares to change their reported prices, while equities trading between ₦500 and ₦1,000 will require 50,000 shares. Stocks priced below ₦500 will continue to require 100,000 shares before a trade can affect the published price. The rule amendment was approved by the SEC on June 16, 2026.

This replaces a one-size-fits-all approach that many market participants had long argued was unfair to expensive stocks. The exchange had previously adopted a uniform threshold of 100,000 units for all equities regardless of their price levels, meaning trades below that figure were treated as small trades and excluded from determining official market prices and other trading statistics. For a stock trading at ₦1,000 or more, 100,000 shares represents a ₦100 million transaction, a volume that thin, high-value stocks rarely see in a single trade.

"The challenge with many high-priced stocks is that they tend to be illiquid. This adjustment is a response to concerns that have existed for some time and should make it easier for market prices to reflect investor demand," said Abiodun Ogunniyi, Head of Research at GTI Capital Limited. "Before now, movement in some of these stocks was largely dependent on institutional liquidity. This reform should make it easier for market activity to influence valuations and improve price discovery."

What changes for your returns? For investors, the amendments mean that larger and more representative trades will have greater influence on stock prices, potentially creating a more accurate reflection of market demand and supply dynamics across the exchange. If you hold premium stocks like GTCO, Dangote Cement, or BUA Foods, expect prices to respond more readily to genuine buying and selling pressure rather than sitting artificially flat because the previous threshold was too high for that price tier to clear easily.

In addition to the revised volume thresholds, NGX has formalised a tiered tick-size structure that determines the minimum price increment at which equities can trade. Group A stocks will trade in increments of 10 kobo, Group B stocks in increments of 5 kobo, while Group C stocks will continue to trade in increments of 1 kobo. Transactions below the relevant threshold for each group will be classified as small trades and excluded from key market statistics, including last traded prices, daily highs and lows, 52-week highs and lows, opening prices, closing prices, and relevant market indices.

Why now? The reform addresses a longstanding concern that relatively small transactions could create outsized price movements that did not accurately reflect genuine investor demand or supply, often distorting valuation metrics and enabling speculative trading strategies in thinly traded equities. Ogunniyi also argued the change could increase retail investor participation in high-priced equities, which many smaller investors previously avoided because of perceived barriers to entry.

The timing places this reform alongside two other significant market structure upgrades. The Nigerian capital market officially transitioned to a T+1 settlement cycle on June 1, 2026, cutting the time it takes for trades to settle from two business days to one. A separate adjustment, effective April 27, moved the opening bell to 9 am and extended the closing gong to 4 pm, nearly doubling the market's daily trading window to seven hours.

The NGX All-Share Index hit an all-time high of 252,508 points on May 13, 2026, and despite a pullback in June, the market still carries a year-to-date return of 56.4%, one of the strongest opening performances of any major global exchange in 2026. Against that backdrop of historic gains, the new pricing rule is less about chasing further upside and more about making sure the prices investors see actually mean what they are supposed to mean.

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