Update to My Take: Stock is now down over 4% today, reaching a low of $ 28.74 with confirming heavy volume. Stock technicals continue to be weak. Wall Street analysts are expressing caution, witness today's downgrade to hold from buy from Stifel Nicholas, and lowered price targets from several others. Market is focusing on Zuckersberg guidance of increased promotional spending resulting in lower margins......far enough but the transition from desktop to mobile is resulting in higher traffic at lower per unit revenue. Higher spending to grow lower margin business is the concern. Share price has already breached 20 day SMA and could reach more significant 50 day SMA now $ 28.14 by this week or early next week. Negative fact pattern is developing without offsetting near term catalysts.