ratio spread
An option strategy that involves either selling or buying a different amount of a call or put at one strike price than is bought or sold of a call or put at another strike price. Forex traders might use a call ratio spread by buying an ATM Euro call/USD put and selling three OTM Euro calls/USD puts to reflect a moderately bullish view on EUR/USD.
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Q1 (2,3,4)
buy in
exponential smoothing