Error in prior close in XLK?
XLK summary says the Tuesday 12.26 close was $65.54. The historical data page (https://finance.yahoo.com/quote/XLK/history?p=XLK) says the Tuesday 12.26 close was 64.11. That would make the quote price change of 6 cents to $64.17 make sense. I don't believe it is a dividend issue.
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Charles Blaine commented
The Friday 12.22 close was $64.54.