High beta stocks easily outperformed their low volatility brethren in the third quarter.

This has given investors yet another sign that momentum is waning for previously beloved defensive sectors such as consumer staples and utilities.

The Consumer Staples Select SPDR (NYSEArca: XLP), the largest consumer staples exchange traded fund, is down 1.4% over the past month. As the staples sector and the corresponding ETFs have soared in response to investors’ demand for lower beta, less risky assets, plenty of naysayers have continually said the sector is poised for a pullback.

Related: 13 Tasty Consumer Staples ETFs to Feast On

Amid fears of rising interest rates and concerns that the sector is overvalued even relative to its lofty historical norms, the consumer staples group has recently encountered some headwinds.

Defensive sectors often trade at premium valuations relative to the broader market and that is certainly the case at the moment with the consumer staples and utilities groups.

“Stepping back from the charts for a moment, we can surmise that investors are worried about interest-rate increases by the Federal Reserve. After all, if rates go up, then the prices for bonds and bond equivalents, such as high-yielding stocks, could go down. Interest rates and bond prices are generally inversely correlated,” reports Michael Kahn for Barron’s.

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Related to interest rate speculation, there is another problem for staples stocks: The rising dollar. Over the past several weeks, the greenback has caught fire, which is not good news for the staples sector because many of the names found in ETFs like XLP generate significant portions of their sales in international markets.

“Another problem weighing on some stocks in the consumer-staples group is the rising dollar, which makes U.S. exports less attractive overseas,” according to Barron’s.

Related: Sticking With Staples ETFs: Is it a Good Idea?

XLP started the year as one of the best-performing non-leveraged sector ETFs. Within the SPDR family, XLP trailed only its utilities counterpart earlier this year. However, XLP is now up just 5.9% and the utilities sector has also fallen out of favor.

Conversely, the cyclical energy and technology sectors are now this year’s best-performing groups. That could be further confirmation investors expect interest rates to rise because cyclical sectors usually perform well as borrowing costs increase.

For more information on the consumer staples sector, visit our consumer staples category.

Consumer Staples Select SPDR (NYSEArca: XLP)