LONDON, Sept. 23 -- Oil prices fell as traders anticipated the possibility of talks between U.S. President Donald Trump and Iran's president during the UN General Assembly's high-level week.

Brent crude declined for a fourth consecutive session to $101.71 a barrel, its longest losing streak in three months. West Texas Intermediate briefly fell below $100, reaching $98.15 for the first time since August.

The four-day decline suggests markets believe the risk premium added after the Iran-Israel conflict escalated in late August has peaked. That judgment remains provisional: if the anticipated diplomatic contact fails to materialize or produces no progress, crude prices could quickly regain the premium.

For now, the UN gathering has had a...