John C. Williams is President and CEO of the Federal Reserve Bank of San Francisco.

A survey of both wage-earning and non-working households, such as those classified as single-member, unemployed, or retired. The headline figure is the percentage change in average spending per household from the previous year. Increases in household spending are favorable for the Japanese economy because high consumer spending generally leads to higher levels of economic growth. Higher spending is also a sign of consumer optimism, as households confident in their future outlook will spend more. At the same time accelerated growth exerts inflationary pressure, which can lead to interest rate increases in the future.

The difference between the value of exports and imports in Germany. Trade Balance is one of the biggest components of Germany 's Balance of Payment. As Germany is Europe's largest economy and given Germany's export oriented economy, trade data can give critical insight into pressures on the value of the Euro.

In order to gauge the effect of German Trade Balance on the Euro, German trade is separated into intra-Eurozone trades and extra-Eurozone trades. Intra-trades between Germany and Eurozone countries have no affect on the overall valuation of Euro. Extra-trades between Germany and other countries outside of Eurozone do impact the overall Eurozone trade balance. Given Germany's large share of Eurozone exports, the figure tends to move the market upon release.

Trade surpluses reflect funds coming into Germany in exchange for goods and services. Such currency inflows may lead to a natural appreciation of a Euro, unless countered by similar capital outflows. At a bare minimum, surpluses will boost up the value of the currency.

The headline figure for trade balance is expressed in billions of Euros.

A country's trade balance reflects the difference between exports and imports of goods and services. The trade balance is one of the biggest components of the Balance of Payment, giving valuable insight into pressures on country's currency.

This is the amount of foreign currency reserves that are held by the Central Bank of a country. In general use, foreign currency reserves also include gold and IMF reserves. Also, people may take into account liquid assets that can easily be converted into foreign currency.