Helen of Troy Ltd. (NasdaqGS: HELE) grew 17.2 percent in price Thursday afternoon to $27.59. Volume was 785,410 shares, more than five times its daily average. The El Paso-based personal care company announced today it has entered into a definitive merger agreement to acquire the business of Kaz, Inc., for $260 million.

Cisco System Inc. (NasdaqGS: CSCO) traded in 59,059,916 shares, to make it among the volume leaders early Thursday afternoon. Share prices improved 2.12 percent to $19.76

Bona Film Group Ltd. (NasdaqGM: BONA) skidded in price 21.29 percent Thursday to $6.69, on volume of 7,715,365 shares on the day of its IPO. The largest privately owned film distributor in China, today announced that its initial public offering of 11,740,000 American depositary shares, each two ADSs representing one ordinary share of the Company, was priced at $8.50 per ADS.