Speculation

n. contemplation, deliberation; conjecture, hypothesis; act of engaging in risky business transactions; buying and selling of commodities in order to profit from market fluctuations

Speculation, in the narrow sense of financial speculation, involves the buying, holding, selling, and short-selling of stocks, bonds, commodities, currencies, collectibles, real estate, derivatives, or any valuable financial instrument to profit from fluctuations in its price as opposed to buying it for use or for income via methods such as dividends or interest. Speculation or agiotage represents one of three market roles in Western financial markets, distinct from hedging, long- or short-term investing, and arbitrage.
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Noun
1. a message expressing an opinion based on incomplete evidence
(synonym) guess, conjecture, supposition, surmise, surmisal, hypothesis
(hypernym) opinion, view
(hyponym) divination
(derivation) speculate
2. a hypothesis that has been formed by speculating or conjecturing (usually with little hard evidence); "speculations about the outcome of the election"; "he dismissed it as mere conjecture"
(synonym) conjecture
(hypernym) hypothesis, possibility, theory
(derivation) speculate, theorize, theorise, conjecture, hypothesize, hypothesise, hypothecate, suppose
3. an investment that is very risky but could yield great profits; "he knew the stock was a speculation when he bought it"
(synonym) venture
(hypernym) investment, investment funds
(hyponym) gamble
(derivation) speculate, job
4. continuous and profound contemplation or musing on a subject or series of subjects of a deep or abstruse nature; "the habit of meditation is the basis for all real knowledge"
(synonym) meditation
(hypernym) contemplation, reflection, reflexion, rumination, musing, thoughtfulness
(derivation) chew over, think over, meditate, ponder, excogitate, contemplate, muse, reflect, mull, mull over, ruminate, speculate

n. speculation, contemplation, deliberation, hypothesis; act of engaging in risky business transactions, buying and selling of commodities in order to profit from market fluctuations

(n.)
The act or process of reasoning a priori from premises given or assumed.
  

(n.)
The act or practice of buying land, goods, shares, etc., in expectation of selling at a higher price, or of selling with the expectation of repurchasing at a lower price; a trading on anticipated fluctuations in price, as distinguished from trading in which the profit expected is the difference between the retail and wholesale prices, or the difference of price in different markets.
  

(n.)
The act of speculating.
  

(n.)
Power of sight.
  

(n.)
Mental view of anything in its various aspects and relations; contemplation; intellectual examination.
  

(n.)
Examination by the eye; view.
  

(n.)
Any business venture in involving unusual risks, with a chance for large profits.
  

(n.)
A game at cards in which the players buy from one another trumps or whole hands, upon a chance of getting the highest trump dealt, which entitles the holder to the pool of stakes.
  

(n.)
A conclusion to which the mind comes by speculating; mere theory; view; notion; conjecture.