ProShares Ultra Silver (AMEX:AGQ) plunged 30.5% in today's trading, closing at $122.04.
The Financial Services stock traded 16,480,848 shares, 4.2x its average daily volume of 3,894,417.9 shares.
ProShares Ultra Silver has a market capitalization of $1.9B. The stock has gained 0.0% year-to-date.