Health care fell 4.2% in five sessions while tech rose 0.9%

Over the five sessions from September 2 to September 10, 2026, the Health Care Select Sector SPDR (XLV) fell 4.22% while the Technology Select Sector SPDR (XLK) rose 0.88%. The 5.10-point gap between the two five-session returns sits at the 3.4th percentile of 6,931 such windows since the two funds’ shared history began in February 1999, meaning fewer than one week in twenty-five has seen health care lag technology by this much.

The chart starts on June 10 because the three-month picture is the opposite of the week’s: health care is still up 8.4% since then against technology’s 4.9%. That makes this a rotation chart rather than a breakdown chart. One week has taken back part of a summer in which health care led, and a percentile this low says the speed is unusual, not that the direction persists; the spread has reached readings at least this low four times since August 7 alone.