One screen shows a share closing at 50.00, while another shows a latest price of 51.20 later that evening. Both figures can be accurate if they describe different trading sessions. The labels and timestamps matter as much as the number.
Investor.gov’s explanation of closing prices distinguishes the regular-session close from later trades and notes that data vendors may present them differently. Its examples concern U.S. markets; other exchanges have their own schedules and conventions.
Reconstruct the comparison
In a fictional example, the regular session ends at 50.00 and a later trade occurs at 51.20. The later price is 2.4 percent above the regular close. That calculation does not change the regular-session closing figure into 51.20.
If the next regular session opens at 50.60, it is 1.2 percent above the previous regular close but below the illustrative after-hours trade. A headline calling the opening “higher” needs a stated comparison point.
Check the exchange, currency, date, time zone and whether the displayed value is delayed. Also distinguish the last traded price from a bid, ask or indicative value. Similar-looking widgets may be presenting different measurements.
Do not turn the display into an execution promise
A reported price does not guarantee that you can buy or sell at that level. Available orders, liquidity, spread and the trading session affect execution. Confirm the broker’s supported sessions and order rules before placing an order.
For a watchlist or research spreadsheet, keep regular close and extended-hours observations in separate labelled fields. Save the source and timestamp so that later comparisons remain understandable.
This is a method for reading market information, not a recommendation to trade a particular share. The first useful step is to establish which price you are looking at before drawing a conclusion about what moved and by how much.