According to @stocktalkweekly, running about 200 positions at 0.5% each means a single call can only contribute roughly 0.5 percentage points to total portfolio return even on a 100% move, so highlighting one pick overstates true impact on portfolio alpha; source: @stocktalkweekly. For trading evaluation, this implies performance should be judged by position-weighted contribution and portfolio-level attribution rather than cherry-picked callouts; source: @stocktalkweekly. Practically, align conviction with size and measure edge via weighted PnL contribution and total portfolio results to avoid misleading signal from small-size winners; source: @stocktalkweekly.