U.S. stock index futures were lower ahead of the open as the excitement over China’s pledge to allow its currency to appreciate faded.
On the economic front, a report on existing home sales from the National Association of Realtors is due after the markets open. Sales are expected to have risen to a seasonally adjusted annual rate of 6.1 million units in May, up from a 5.77 million unit rate in April. The Fed begins its two-day meeting today, with an announcement scheduled for tomorrow.