gap down

Think of the way a market woman prices her tomatoes each morning. Yesterday evening she sold a basket for ₦8,000. Overnight, news reaches her that a truck load just arrived from Benue and tomatoes are now everywhere. She does not slowly reduce her price through ₦7,500, ₦7,000, ₦6,500. She simply opens her stall the next morning shouting ₦5,000, because the world changed while everyone was asleep.

That jump straight past all the prices in between is exactly what a gap down looks like on a stock chart. A share closes at ₦45 one evening. Overnight, the company releases bad results, or there is troubling news about the economy, or something shakes confidence while the market is shut. When trading opens the next morning, the first price printed might be ₦38. Nobody traded at ₦44, ₦42 or ₦40. The price simply fell through those levels while the market was closed, and the chart shows an empty space, a gap, between where it used to be and where it now sits.

This happens on the Nigerian Exchange too. Consider a bank stock closing at ₦28 on a Friday. Over the weekend, the Central Bank announces a policy that worries investors about that sector. Monday morning, the stock opens at ₦24. Anyone who wanted to sell at ₦26 or ₦27 simply could not, because trading never happened there.

For a Nigerian abroad who checks their portfolio app before work in London, a gap down can look alarming, like the bottom fell out overnight. It usually just means new information arrived while the market was resting, and the opening price is the market's fast, collective reaction.

The lesson is not to panic at every gap. Some close quickly as the day goes on, others do not. What matters is understanding that price does not always move in gentle steps. Sometimes it leaps, and the space it leaves behind tells its own story.