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Day trading is speculation in securities, specifically buying and selling financial instruments within the same trading day. Strictly, day trading is trading ''only'' within a day, such that all positions are closed before the market closes for the trading day. Many traders may not be so strict or may have day trading as one component of an overall strategy. Traders who participate in day trading are called day traders. Traders who trade in this capacity with the motive of profit are therefore speculators. Some of the more commonly day-traded financial instruments are stocks, options, currencies, and a host of futures contracts such as equity index futures, interest rate futures, and commodity futures. Day trading was once an activity that was exclusive to financial firms and professional speculators. Many day traders are bank or investment firm employees working as specialists in equity investment and fund management. However, with the advent of electronic trading and margin trading, day trading has become increasingly popular among at-home traders. ==Characteristics== Some day traders focus only on price momentum, others on technical patterns. Some traders choose to focus on a limited number of strategies they feel can be profitable. Some day traders use an intra-day technique known as scalping that usually has the trader holding a position for a few minutes or even seconds. Most day traders exit positions before the market closes to avoid unmanageable risks—negative price gaps (differences between the previous day's close and the next day's open bull price) at the open—overnight price movements against the position held. Other traders believe they should let the profits run, so it is acceptable to stay with a position after the market closes.〔Sale, Robert (2001). ''Trading Strategies for Direct Access Trading: Making the Most Out of Your Capital''〕 Day traders sometimes borrow money to trade. This is called margin trading. Since margin interests are typically only charged on overnight balances, the trader pays no fees for the margin benefit, though still running the risk of a margin call. The margin interest rate is usually based on the broker's call. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「day trading」の詳細全文を読む スポンサード リンク
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