THE OPTION DELTA by Technical Analysis, Inc.
Simply stated, the delta of an option is the amount by which the option will increase or decrease in price
if the underlying instrument moves by 1 point. The deltas of call options have positive values, while
those of put options have negative values. The delta of a call option will be close to 1, or 100%, if the
underlying instrument is trading well above the strike price of the option. If the underlying instrument is
trading well below the strike price of the call, the delta will be nearly zero.