A software glitch forced the largest US venue for exchange-traded funds to close for 15 minutes on Monday, the latest snafu to raise questions about the reliability of markets that rely increasingly on high-speed computers.

NYSE Arca suffered a problem with a software update that was rolled out during the weekend, said Kristen Kaus, an NYSE spokeswoman. The all-electronic exchange, part of the New York Stock Exchange, is home to $2.2 trillion in exchange-traded products, or 92% of such US-listed funds, according to its website.