The sector model has been whipsawing this week.
On Friday it jumped from XLF (financials) to XLU (utilities).
On Monday it went back to XLF.
On Wednesday it went back to XLU.
These are real time trades, made just before the close. A margin account can make the change on any given day, but a cash account needs to wait three days between trades.
Both cash and margin accounts would be in XLU this morning.