Key Highlights

  • Utilities Select Sector SPDR Fund (NYSEARCA:XLU) gained 3.97% in the week of October 5 to 9, 2026, leading sectors, with a Google and Constellation nuclear power deal from October 6 to 7 offered as context only and not as a proven cause.
  • Communication Services Select Sector SPDR Fund (NYSEARCA:XLC) is down about 6.2% in 2026, the worst sector, and fell 1.6% on Friday, with Meta and Alphabet making up about 45% of the group, according to a single year-to-date report.
  • Technology Select Sector SPDR Fund (NYSEARCA:XLK) covers a sector for which LSEG expects third-quarter earnings growth of 66.5%, though no year-to-date move for the fund is quoted in the information reviewed, so none is stated here.
  • Energy Select Sector SPDR Fund (NYSEARCA:XLE) belongs to a group whose ETFs are up about 45% this year, the best of any sector, and whose third-quarter earnings are expected by LSEG to grow 123%.

Utilities Select Sector SPDR Fund (NYSEARCA:XLU): The Weekly Leader

Utilities Select Sector SPDR Fund (NYSEARCA:XLU) holds the utility companies in the S&P 500 and rose 3.97% over the week of October 5 to 9, 2026, the best weekly result among sectors in the report reviewed. Utilities are usually seen as defensive, income-oriented stocks, so leadership is notable in a market where the S&P 500 closed at 7,811.5 on October 9. A Google nuclear power purchase deal with Constellation Energy, announced between October 6 and 7, supports the theme of rising power demand from artificial intelligence data centers, but it falls partly before the window and is context only. The weekly figure comes from one report and should be confirmed against fund data. Risks include heavy debt, regulated returns, construction delays on new generation and the 10-year Treasury yield near 5.25%, which competes with utility dividends for income-seeking investors. Utilities Select Sector SPDR Fund (NYSEARCA:XLU) could lose its lead if yields rise further after the CPI report due October 14, 2026.

Communication Services Select Sector SPDR Fund (NYSEARCA:XLC): The Year's Laggard

Communication Services Select Sector SPDR Fund (NYSEARCA:XLC) is down about 6.2% in 2026, which makes communication services the worst sector of the year, and it fell 1.6% on Friday, October 9, 2026. The year-to-date number comes from a weekly report and a daily summary, and it is reported and not confirmed. The fund is concentrated, because Meta Platforms and Alphabet make up about 45% of the group, so the performance of two advertising-driven companies largely decides the sector result. The information reviewed does not explain the weakness, so no cause is asserted. That is notable for a group of mega-cap companies that many investors expect to lead. Risks include softer advertising demand, regulatory action, heavy spending on artificial intelligence, antitrust scrutiny of large platforms and sensitivity to rates. Because the fund is concentrated, Communication Services Select Sector SPDR Fund (NYSEARCA:XLC) could also recover faster than a broad index if either of its two largest holdings rebounds. A weak year is not a forecast for the next period.

Technology Select Sector SPDR Fund (NYSEARCA:XLK): Earnings Growth Is the Story

Technology Select Sector SPDR Fund (NYSEARCA:XLK) tracks the technology companies in the S&P 500. The information reviewed gives no year-to-date or weekly return for the fund, so none is quoted. What it does give is an expectation: LSEG forecasts third-quarter earnings growth for the technology sector of 66.5%, second only to energy among the groups highlighted. Overall S&P 500 growth is expected at 30.6% by LSEG and 34% by Deutsche Bank, while another consensus figure of 26.7% suggests a different base, so the range should be used. These are upcoming estimates for a reporting season that has not finished, and results can miss them. Technology Select Sector SPDR Fund (NYSEARCA:XLK) is also sensitive to the 10-year yield near 5.25%, because long-dated growth earnings lose value when discount rates rise. Concentration in a few very large holdings is another risk, and a miss by one of them could move the whole fund. Readers should watch company releases between October 13 and 16, 2026 and compare them with published estimates.

Energy Select Sector SPDR Fund (NYSEARCA:XLE): The Sector With the Largest Gain

Energy Select Sector SPDR Fund (NYSEARCA:XLE) holds large US energy producers, refiners and service companies, and energy ETFs are up about 45% this year, the best result of any sector. WTI crude settled near USD 91 and Brent near USD 103 to 104 in the October 9, 2026 session, and LSEG expects third-quarter energy earnings to grow 123%. A gain that large has already priced in considerable strength, so the group is exposed to news that lowers oil prices, such as a Strait of Hormuz agreement or added Russian diesel supply. Supply shocks, such as a Gulf hurricane, can raise prices instead. The published information gives no one-day move for Energy Select Sector SPDR Fund (NYSEARCA:XLE), so none is quoted. Oil company profits are cyclical, which means estimates can change quickly, and a base effect from weak earlier quarters can inflate growth rates such as 123%. Readers should treat the figure as an estimate and not as a result.

Where Things Stand

The four sector funds diverge because each reflects a different driver: power demand for utilities, two dominant stocks for communication services, earnings growth for technology and oil prices for energy. Utilities Select Sector SPDR Fund (NYSEARCA:XLU) leads the week. Communication Services Select Sector SPDR Fund (NYSEARCA:XLC) lags the year. Technology Select Sector SPDR Fund (NYSEARCA:XLK) carries a strong earnings estimate, while the energy fund is the year's best performer by price. Several figures come from single reports and need confirmation, and the energy and technology growth rates are estimates for a season that has barely begun. The next markers are the CPI report on October 14, 2026 at 8:30 a.m. ET and earnings from October 13 to 16. None of this is a forecast.