Markets /SFK ProShares UltraShort Russell100 SFK Full chart Compare Add to watchlist Set alert Price alert · SFK Alert when the price is Price abovePrice below Price level Set alert All alert types No live quote for SFK yet. Overview Chart Financials FinancialsValuation & healthEarnings EarningsDividends & splitsAnalysts News Ownership Options Notes ComparisonSignalsTrend ScoreDiscussionNotesPositionsAlerts ComparisonSignalsTrend ScoreDiscussionNotesPositionsAlerts Your note Sign in to keep a note on SFK — it syncs with the Stock Master app.