Exchange-traded funds that track precious metals and miners slumped Tuesday in premarket trade, on track for their biggest daily decline since March, suggesting that a long run-up might be on track to reverse course. The SPDR Gold Shares ETF was down 3.2%, while the VanEck Vectors Gold Miners ETF lost 4.5%. The iShares Silver Trust slid about 6%, and the Global X Silver Miners ETF was down about 5.5%. Both precious metals have surged to record highs over the past several weeks, boosted by declining interest rates and geopolitical concerns.Market Pulse Stories are Rapid-fire, short news bursts on stocks and markets as they move. Visit MarketWatch.com for more information on this news.