Investors on edge as debt ceiling talks and inflation data loom.

US stock futures edged downward ahead of the open on Tuesday as investors watch highly anticipated talks on a fast-approaching debt ceiling deadline. Razor-thin margins in Congress are complicating the matter. Wall Street is also looking ahead to Wednesday's April inflation report. Nearly half of US banks are tightening their lending standards as the US gets closer to the brink of a default. Confidence among small-business owners fell in April to the lowest level since 2013, signaling a pullback in business investment. On the earnings front, Wall Street anticipates results from Airbnb, Rivian Automotive, and Occidental Petroleum.