Oil prices, which had risen after U.S.-Iran peace talks in Geneva were abruptly postponed, turned lower Friday once Israel and Iran-backed Hezbollah agreed to a ceasefire effective 4 p.m. local time. A U.S. official confirmed the agreement to CNBC, triggering a swift reversal in crude's earlier session direction.

Why the Geneva Postponement Initially Pushed Oil Higher

A geopolitical risk premium is the markup embedded in an asset's price to reflect the probability that conflict disrupts supply. For crude oil, the Middle East has long been the primary source of that premium — any signal that diplomatic containment of regional tensions has stalled tends to move energy markets immediately.

When U.S.-Iran talks in Geneva broke down without a rescheduled date, traders read the abrupt postponement as an increase in that probability. Oil moved higher in response, pricing in a world where the diplomatic channel had narrowed.

How the Ceasefire Changed the Market's Read

A ceasefire between Israel and Hezbollah — the militant group backed by Iran — directly reduces one of the flashpoints underpinning the region's risk premium. With the agreement set to take effect at 4 p.m. local time on Friday, according to a U.S. official speaking to CNBC, the market had a concrete reason to unwind part of the bid that had built earlier in the session.

The sequencing is instructive for anyone running an energy book: the same session that opened with oil climbing on geopolitical anxiety ended with prices in retreat on a diplomatic development. Crude, in this instance, tracked real-time risk signals more closely than any supply-and-demand fundamental.

What Traders Are Watching Now

Two variables now sit at the top of any energy desk's monitor. First, whether the Israel-Hezbollah ceasefire holds through its opening hours — agreements in the region have collapsed before. Second, whether U.S.-Iran talks in Geneva are rescheduled and what conditions surround any resumption.

Progress on either front would likely sustain downward pressure on the risk premium embedded in crude. Failure on either would reopen the trade that briefly sent oil higher earlier Friday.