US Futures Flat Ahead of Walmart Earnings as Treasury Expands Debt Buybacks

U.S. stock futures were largely unchanged on August 20, with a modest Nasdaq tilt higher as traders processed rising oil prices and a rebound in long‑end Treasury yields. Walmart's earnings release and economic data were awaited, while the Treasury announced it will double the size of its debt buyback program to at least $4 billion, targeting 10‑ to 30‑year bonds. These developments together shaped a cautious market tone.

U.S. equity futures were roughly flat on the morning of August 20, with a slight Nasdaq tilt higher, as traders balanced firmer oil against a bid returning to the long end of the Treasury curve. WTI traded near $86.80 and Brent around $93.90, lifted by Middle East tensions and President Trump's announced economic pressure campaign on Iran, while the 10-year yield sat around 4.65% to 4.67% and the 30-year near 5.22% ahead of WMT's earnings and the day's data .

The more consequential item was fiscal plumbing. The Treasury disclosed an expansion of its debt buyback operations, raising the maximum operation size from $2 billion to at least $4 billion and concentrating purchases in the 10- to 20-year and 20- to 30-year sectors, with operations scheduled from September 9 through November 4. The move follows what CNBC described as a buyers' strike in that part of the curve since late June. Yields fell on the news, with the 10-year down six basis points to 4.647% and the 30-year down nine basis points to 5.196% .

That combination sets up a genuine tug of war. Higher crude supports energy names and feeds through to headline inflation, which argues for higher long-end yields, while a larger official bid for long paper works in the opposite direction. Equity valuations, particularly for the long-duration megacap complex that drives the Nasdaq, sit directly on the outcome of that contest.

Walmart's print later in the session carried the consumer read, and it landed mixed: a revenue and EPS beat alongside the slowest U.S. comparable sales growth in more than six years.

What to watch: whether the expanded buyback holds long-end yields down once the September 9 operations actually begin, the persistence of the oil bid if Middle East headlines cool, and whether long-duration equity leadership reasserts itself as term premium compresses.

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