Open & Close

Aug 26 · 1 min read

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Today’s Open & Previous Close are two data points that are included in the summary statistics of every stock.

Open

Today’s Open, or just Open in some apps, is the price of a stock when the market last opened. With the New York Stock Exchange and the NASDAQ, the two largest exchanges in the world, officially opening at 9:30am ET, the Open price of a stock is simply what the price of that stock was at 9:30am. This price will stay as the Open until the markets open again on the next trading day.

Close

The Previous Close, also known as Close in some apps, is the price of a stock when the market closes. With the New York Stock Exchange and the NASDAQ officially closing at 4pm ET, the Close price of a stock is simply what the price of that stock was at 4:00pm. Just like the Open, this price will stay as the Close until the markets close again on the next trading day.