Wall Street ends lower, off record highs, as Treasury yields climb

* SpaceX falls after reports of $40 billion financing push

NEW YORK, Oct 7 (Reuters) - Wall Street closed lower on Wednesday, as long-dated US Treasury yields resumed their climb, reviving fears about inflation and mounting debt the day after the S&P 500 and the Nasdaq hit record closing highs.

All three major US stock indexes were modestly lower, with the S&P 500 and the Dow poised to snap their four-day winning streaks. The Nasdaq was on track for its first down day in six.

The small-cap Russell 2000 underperformed its larger cap counterparts.

In the wake of Tuesday's stock market rally, Brent crude briefly crept above $100 per barrel and the 30-year Treasury bond yield touched a 24-year high.