Sotheby’s narrow lead in trader sentiment for the higher 2026 sales total stems primarily from its record first-half performance, including a house-best $4.4 billion in consolidated revenue and an all-time high in private sales that outpaced recent years. Strong marquee results from collections like the Lewis and Mnuchin estates, combined with gains in luxury categories, Old Masters, and diversified platforms such as the Breuer, have bolstered perceptions of sustained momentum heading into the fall and winter seasons. Christie's edged ahead slightly on headline H1 figures thanks to blockbuster Newhouse and Gund dispersals, yet Sotheby's broader category strength and higher bidder participation per lot suggest resilience in a top-heavy market. Key catalysts ahead include Q3-Q4 auction calendars and any late single-owner consignments that could shift the year-end totals.