April 25, 2026
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Serving Intelligent Investors

R

Random variable A function that assigns a real number to each and every possible outcome of a random experiment. Random walk Theory that stock price changes from day to day are at random; the changes […]

Q

Quality option Also called the swap option, the seller’s choice of deliverables in Treasury Bond and Treasury note futures contract. Quanto A currency-protected derivative product that is, one denominated in a currency other than that […]

P

Pack A Forward Strip, each corresponding to a particular year, of four consecutive, quarterly Eurodollar or Euroyen futures contracts. Markets, such as Simex offer a Pack as a convenient package of futures contracts, without the […]

Put – Call Ratio

The Put-Call Ratio is the number of put options traded divided by the number of call options traded in a given period. While typically the trading volume is used to compute the Put-Call Ratio, it […]

Options contract

A contract that, in exchange for the option price, gives the option buyer the right, but not the obligation, to buy (or sell) a financial asset at the exercise price from (or to) the option […]

N

Naive diversification A strategy whereby an investor simply invests in a number of different assets and hopes that the variance of the expected return on the portfolio is lowered. Related: Markowitz diversification. Naked The opposite […]

M

Macaulay Duration 1. A measure of the sensitivity of a financial instrument’s value to a change in its yield. Macaulay Duration is an overestimate, and Modified Duration (q.v.) is a more precise measure. 2. The […]

L

Ladder Option An option somewhere between a Lookback (q.v.) and a European Option. A Ladder Call Option has one or more “Rungs” (price levels) above the initial spot level. The Call’s payoff equals the greater […]

K

Kappa The ratio of the dollar price change in the price of an option to a 1% change in the expected price volatility. Knockin Option An option that “comes to life” when a trigger event […]