Yahoo finance chart - interpreting bid and ask values

External question — Personal Finance Stack Exchange Author: John Smith Original post: https://money.stackexchange.com/questions/121386 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. The market is currently closed, and here is the chart for the previous trading day for AAPL. https://finance.yahoo.com/quote/AAPL Next to "bid" it says: 0.00 x 800 Next to "ask" it says: 0.00 x 900 Since the market is closed, what do these values refer to? Are these limit orders currently placed for the market open? Also it was my understanding the bid-ask spread is usually quite tight? A further question: the graph indicates an opening price of 267.1, but in the summary it says the open was 263.75, quite a large difference. Which number is correct? I've searched around on Yahoo site and can't find the information. New to all this so thanks for any help.

External answer — Personal Finance Stack Exchange Author: Bob Baerker Original post: https://money.stackexchange.com/a/121392 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. The regular market may be currently closed but stocks trade during the pre-market (4-9:30 AM EST) and during after hours (4-8 PM). Your Yahoo chart is only displaying regular session information. Right this minute, the real time quote is: $276.50 x 100 $276.88 x 800 That means that someone is looking to buy 100 shares at $276.50 and other(s) are looking to sell 800 shares at $276.88 When I click your link it shows: Bid = 279.80 x 800 Ask = 275.95 x 900 The bid is higher than the ask. It's bad data.