The Dow trades above 45,000 for the first time. It may be time to rethink what makes a milestone. - MarketWatch

1. Dow crossed 45,000, its highest level ever, during 2024 rally. 2. The milestone represents diminishing percentage gains since previous milestones. 3. Fastest 1,000-point milestone underscored changing market dynamics and stock composition. 4. Technology's influence in the Dow has significantly increased over decades. 5. Investors are advised to focus on percentage gains rather than numeric milestones.