Coercivity, measured in Oersteds (Oe.), is very loosely defined as the magnetic field required to encode or erase a magnetic stripe. Ordinary low coercivity magnetic stripes (often called loco) are rated at 300 Oersteds; some others are in the range of 600-650 Oe. High coercivity stripes (often called hico or high energy) are generally in the range of 1250-4000 Oe. Bank and financial stripes average around 2750 Oe. High coercivity tapes are more resistant to accidental erasure.