Shares of Camber Energy Inc. /zigman2/quotes/201242655/composite CEI -4.24% tumbled another 21.6% in active trading Wednesday morning, putting them on track to shed more than two-thirds of their value in four days. Trading volume was 128.5 million shares less than an hour after the open, making the stock the most actively traded on major U.S. exchanges. The oil and natural gas company's stock had plunged 50.5% on volume of 845.0 million shares on Tuesday, and 59.9% over the past three sessions, after rocketing 161.6% amid a six-day win streak that ended at a two-year closing high of $3.82 on Sept. 30. The stock is now trading 68.5% below that two-year high. The stock's selloff on Wednesday comes as natural-gas futures /zigman2/quotes/210189548/delayed NG00 +3.33% slumped 7.5%, after closing Tuesday at a 13-year high, and crude oil futures /zigman2/quotes/209723049/delayed CL00 -0.22% shed 1.6% after closing at an seven-year high on Tuesday. Meanwhile, the S&P 500 /zigman2/quotes/210599714/realtime SPX -0.42% fell 0.5%.


