ARTICLE SYNOPSIS ...Premarket Prediction by Victoria Wang Can premarket activity be a powerful predictor as to how underlying stocks will perform during regular market hours? Will this knowledge be advantageous to traders? Premarket activity refers to stocks that undergo active trading before the US market opens -- that is, before 9:30 ET. This activity may be caused by earning announcements from either before the market opens or after yesterday's close, upgrading or downgrading by analysts, or other news that may influence the stocks' movement. After analyzing about a half-year's data, we are beginning to uncov...