ARKW price change up 15% 20181227 in Gross Error. Error existed all day and at close. Would post annotated screen shot if could.
ARKW price change on 12-27-2018 in gross error (like +15% instead of -15%) all day and at close. Current price and previous close look OK. Annotated screen shot available.
69th
ranked

Hello James,
Thank you for reporting this feedback. Yahoo Finance specialists are always available to correct these errors, and screenshots are accepted by going here: https://io.help.yahoo.com/contact/index?page=home&locale=en_US&y=PROD_FIN.
Please reach out to us anytime!
Regards,
Yahoo Finance