About half of the price-weighted Dow's (DIA -0.8%) 130 point loss today is the result of Visa's $10.23 decline to $212.48. The Nasdaq 100 (QQQ -0.6%)? About 95% of its drop this session is due to an 11% dive in Amazon. The S&P 500 (SPY -0.5%) can thank the two names for about one-third of its decline. Previously: Lowered price targets and downgrade for Amazon; -9.8% premarket Previously: Visa slips despite beating headline estimates