差价合约（CFD）是复杂的工具，由于杠杆作用，存在快速亏损的高风险。81.1% 的散户投资者在于该提供商进行差价合约交易时账户亏损。 您应该考虑自己是否了解差价合约的原理，以及是否有承受资金损失的高风险的能力。
While typically calculated on an annual basis, GDP data is also released quarterly, and it is these releases upon which markets place the most emphasis, given their relatively timely nature. Although GDP figures are constantly being revised (often for many years after the initial estimate has been released), it tends to be the initial estimate which causes the most significant market impact, with any revisions typically relatively minor in nature.
Upon release, the figures are typically represented as a percentage change in both QoQ and YoY terms, signifying the GDP growth/contraction over the quarter in question, with the QoQ figure often the more impactful figure in terms of resulting market volatility. Of course, two consecutive quarterly contractions (represented as a decline in GDP growth) results in what economists define as a technical recession.
GDP is typically calculated via the income method, which uses the following formula:
GDP = C + I + G + (X-M)
Where:
- C = consumer spending
- I = business investment
- G = government spending
- (X-M) = net exports (i.e. exports - imports)
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