How does government intervention affect a dirty float system?

In a dirty float system, also known as a managed float system, government intervention plays a significant role in influencing exchange rates without completely fixing them. When a government or central bank intervenes in this kind of system, it typically buys or sells its own currency in the foreign exchange market to stabilize or influence the value of its currency. This intervention can help curb excessive volatility and prevent extreme fluctuations that may not reflect the underlying economic fundamentals.

By intervening, the government can influence market-determined exchange rates, allowing them to adjust to changes while still providing a level of stability and predictability. The balance is maintained between letting market forces play a role in determining exchange rates while also stepping in when necessary to adjust or stabilize those rates.

In contrast, the other options do not accurately reflect the dynamics of a dirty float system. The option indicating no effect overlooks the active role governments take in managing their currencies. The notion of setting rigid exchange rates does not apply since a dirty float allows for greater flexibility than a fixed exchange rate regime. Lastly, suggesting that government intervention eliminates market forces entirely does not hold true, as the market still largely determines exchange rates, but with some influence from government actions.