Beijing is entirely within its rights to influence, manipulate, rig or fix currency values, and it is unlikely that Washington can devise retaliatory measures that are not themselves violations of America's trade commitments, especially those spelled out in the rules of the World Trade Organization.

FORBES: China Is Susceptible To Currency Pressure

They must either fully fix their currency, to the dollar, say, through a currency board or dollarisation, or they must allow it to float freely.

ECONOMIST: Intervention: divine or comic?

Various attempts to fix one European currency against each other, such as the Exchange Rate Mechanism, crumbled in the face of divergent economic performances in the countries concerned.

ECONOMIST: Currencies

Hedging allows companies to fix the price of a currency months in advance.

BBC: Launching new models ate into BMW's finances

They have yet to fix the instability of a currency union built on an incompatible triad: no bail-out, no default and no exit.

ECONOMIST: Charlemagne

He was particularly prone to quick-fix solutions in economic policy, resorting to regular currency devaluations, expropriations of private firms and inflation-busting public-sector pay rises rather than tackling the economy's underlying structural problems.

BBC: Hugo Chavez leaves Venezuela in economic muddle

Indeed, all this proposal really does is fix the price of a particular commodity quoted in a particular currency.

FORBES: Connect

An application developed by Glenn Sinclair, a Splunk user in the UK, translates FIX messages so business users can draw information such as the volume of currency trades by pairs.

FORBES: Security Data Is Big Data And A Business Advantage

After watching the currency free-fall for several days, the Central Bank of Iceland stepped in Tuesday to fix the exchange rate of the krona at 175 a level equal to 131 krona against the euro.

NPR: Iceland Shivers From Financial Crisis