The healthcare sector, as measured by the XLV ETF, is down 1.28% in pre-market trading, mirroring a broader market decline. U.S. stock futures are lower across the board as investors return from the Labor Day weekend. The negative sentiment is driven by a combination of rising oil prices due to geopolitical tensions in the Middle East, concerns about persistent inflation, and the prospect of further interest rate hikes by the Federal Reserve. Additionally, new retaliatory tariffs from Canada on U.S. goods are weighing on the market.