Copper Reversal and Inflation Pressures Pull Materials Lower

On Thursday, September 10, breadth was weak across Materials, with 16.7% of its companies advancing. The cap-weighted sector finished at -1.4%, while an equal-weighted measure of the same stocks was -0.9%, showing that the largest names accounted for the majority of the decline. The primary vehicle for tracking the group, Materials Select Sector SPDR Fund (XLB), an exchange-traded fund, closed -1.2% at $50.77. The move was dragged down by Freeport-McMoran Copper & Gold Inc (-6.6%) after copper prices retreated 3.1% from record levels following reports that the White House delayed a decision on proposed tariffs for refined copper imports.

Macroeconomic pressure added to the commodity retreat. Headline inflation readings weighed on equities following a hotter-than-expected August producer price index report. At the same time, rate concerns deepened as crude oil climbed above $100 a barrel. Materials led declines across the market on a session where 2 of the 11 sectors rose.

Internal performance showed a split between raw commodity producers and packaging firms. While mining equities tumbled, select packaging and chemical companies held gains. Packaging Corp of America (+2.3%) paced the advancers, followed by Dow Inc (+0.8%), though our sources show no company-specific catalysts reported for their moves. That divergence kept equal-weighted performance ahead of the cap-weighted sector. In adjacent industrial supply chains, domestic manufacturers continued expanding physical capacity, including an expanded solar manufacturing facility in New Mexico.

EasyAlpha grades 83.8% of the holdings in Materials Select Sector SPDR Fund against their industry peers. Within that graded group, 41.2% earn an A or B quality grade. Companies graded A or B have stronger fundamentals, and historically they have carried a lower risk of large drawdowns than companies graded D or E. That quality profile shapes the fund's $8.8 billion portfolio, which provides broad sector exposure at an annual expense ratio of 0.08%.

The session adds to recent weakness for the sector. Over the past month, XLB is -4.6%, and it is -2.8% over the past one hundred sessions. Over longer horizons, the fund is +2.2% over the past six months, though it remains -44.0% over the past twelve months.