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judymcconville@roadrunner.com 2017-04-26 13:53:36 -07:00
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@ -166,7 +166,7 @@ Alice was introduced to bitcoin by a friend so she has an easy way to acquire he
((("getting started", "exchange rates")))((("exchange rates", "determining")))Before Alice can buy bitcoin from Joe, they have to agree on the _exchange rate_ between bitcoin and US dollars. This brings up a common question for those new to bitcoin: "Who sets the bitcoin price?" The short answer is that the price is set by markets.
Bitcoin, like most other currencies, has a _floating exchange rate_. That means that the value of bitcoin vis-a-vis any other currency fluctuates according to supply and demand in the various markets where it is traded. For example, the "price" of bitcoin in US dollars is calculated in each market based on the most recent trade of bitcoin and US dollars. As such, the price tends to fluctuate minutely several times per second. A pricing service will aggregate the prices from several markets and calculate a volume-weighted average representing the broad market exchange rate of a currency pair (e.g., BTC/USD).
((("exchange rates", "floating")))((("floating exchange rate")))Bitcoin, like most other currencies, has a _floating exchange rate_. That means that the value of bitcoin vis-a-vis any other currency fluctuates according to supply and demand in the various markets where it is traded. For example, the "price" of bitcoin in US dollars is calculated in each market based on the most recent trade of bitcoin and US dollars. As such, the price tends to fluctuate minutely several times per second. A pricing service will aggregate the prices from several markets and calculate a volume-weighted average representing the broad market exchange rate of a currency pair (e.g., BTC/USD).
There are hundreds of applications and websites that can provide the current market rate. Here are some of the most popular: