Premarket: U.S. futures buoyant as markets sail toward tariff storm

Financial markets made an optimistic start on Monday with U.S. stock futures rising and the dollar firm ahead of a week driven by data, and the threat of steep U.S. tariff hikes on the horizon. S&P 500 futures were up about 0.7% in the Asia session and Nasdaq 100 futures rose 0.8%. European futures were up 0.3% in the Asia afternoon. Japan's Nikkei and Hong Kong's Hang Seng wobbled around flat and the euro, which fell slightly last week, steadied at $1.0822. In emerging markets, Indonesia's fragile stock market suffered another sharp fall while Turkey's lira was on a knife's…