OPEC and its allies abandoned oil-supply negotiations until Monday as a rebellion by a key member threatened the unity of the alliance. Talks ended without a deal to increase output after the United Arab Emirates doubled down on demands for better terms. The impasse — which had already pushed discussions into a second day — risks upsetting the cartel’s management of the oil market’s post-pandemic recovery just as consumer nations fret about the impact of higher prices. Negotiations will resume next week after what’s likely to be a weekend of furious diplomacy. The U.S. has already voiced concerns about rising gasoline prices as oil tops $75 a barrel. Failure to agree on raising output would squeeze an already tight market, potentially sending crude prices sharply higher. But the opposite scenario is also in play: if unity breaks down entirely, a free-for-all would crash prices — as it did during […]