If I own some stock, then buy more and then sell, is that a wash sale?

External question — Personal Finance Stack Exchange Author: DiYer Original post: https://money.stackexchange.com/questions/113376 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. I use Robinhood for stock trading that uses FIFO (there is no other selectable option). If I.. Bought 10 shares of SSS 1/1/2019 at 1:00 pm at $100 each = $1000 Bought 10 shares of SSS 9/1/2019 at 2:00 pm at $50 each = $500 Sold 10 shares of SSS 9/1/2019 at 2:02 pm at $50 each = $500 According to wash sale, what is my cost basis for year 2020 - $50 each ($500 total)? and I can claim the $500 loss in 2019 assuming no more transactions for stock SSS? If #2 and #3 were flipped, I know that would be a clear case of wash sale. I am confused because #2 and #3 happened the same day and #3 (selling) a few minutes after #2 (buying).

External answer — Personal Finance Stack Exchange Author: user19035 Original post: https://money.stackexchange.com/a/146022 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. Yes, it is a wash sale. You bought the shares within 30 days of the sale. It doesn't matter if the purchase is before or after the sale. If the transaction order mattered, then what you suggest would be the easiest, most obvious loophole around wash sales, rendering the wash sale rule effectively pointless.