Deep-pocketed investors have adopted a bearish approach towards Halliburton HAL, and it's something market players shouldn't ignore. Our tracking of public options records at Benzinga unveiled this significant move today. The identity of these investors remains unknown, but such a substantial move in HAL usually suggests something big is about to happen.We gleaned this information from our observations today when Benzinga's options scanner highlighted 10 extraordinary options activities for Halliburton. Thi ...