Why are stock prices in the pre-market different from other platforms?

There are two reasons that the stock prices in pre-market are different:

  • Data sources

The stock trading screen adopted by each trading platform may be different. Basic users can access to the pre-market prices based on Nasdaq Basic LV1 data. Users can access to complete extended market data by paying the fee in exchange for an upgrade to Nasdaq TotalView.

  • Odd lots

A round lot is a standard number of securities to be traded on an exchange. In stocks, a round lot is considered 100 shares or a larger number that can be evenly divided by 100. However, an odd lot is an order amount for a security that is less than the normal unit of trading for that particular asset. So the transactions of odd lots are not calculated for pre-market and after-market prices.

Was this article helpful?
You can also contact Customer Services for help.
Every question you ask will be answered
Scan the QR code to contact us
Also you can contact us via