Science / Geology / Delta: A deposit of sediment that forms where a stream enters a standing body of water such as a lake or ocean. The name is derived from the Greek letter 'delta' because these deposits typically have a triangular shape in map view.

Delta Hedge

Business / Finance / Delta Hedge: The ratio of the change in price of a call option to the change in price of the underlying stock. Also called the hedge ratio. Applies to derivative products. Measure of the relationship between an op MORE

Delta Neutral

Business / Finance / Delta Neutral: A dynamic hedging strategy using options that calls for constant adjustment of the number of options used, as a function of the delta of the option. MORE

Wye-Delta Starting

Technology / Motors / Wye-Delta Starting: A method of starting a motor at rated voltage but drawing locked rotor current and producing reduced stocked rotor torque but it provides lower starting torque than a straight delta connection. Once t MORE

Delta Kame

Science / Geology / Delta Kame: A deposit having the form of a steep, flat topped hill, left at the front of a retreating continental glacier. MORE


Technology / Aviation / Delta-Wing: A triangularly-shaped aircraft wing having a low aspect ratio, a sharply-tapered leading edge, a straight trailing edge, and a pointed tip. MORE

Hedge Ratio (Delta)

Business / Finance / Hedge Ratio (Delta): A fund that may employ a variety of techniques to enhance returns, such as both buying and shorting stocks according to a valuation model. MORE