mokakda ban rupiyala pawenawa kyanne?
rupiyala pakaranawa kiyanne, rupiyale agaya anith currencies walata sapekshawa market eke demand eka saha supply eka matha thieeranaya weema.
If a country is more into importing rather than exporting, you will have to sell rupees and buy US dollars to purchase an item. For example if you need to buy a vehicle from US you need to sell rupees and buy US dollars if the seller in US doesn't accept sri lankan rupees.
If everyone tries to buy vehicles, then there will be more rupees in the market compared to US dollars/other currencies. And as a result rupee will depreciate against US dollars. If the supply is more than the demand the prices should come down theoretically.
(It's the other way around for exporting.)
There are two types, when it comes to floating. Free/Clean floating and dirty floating. There's no involvement by a 3rd party in a free floating market. Sri lanka is country where you have a dirty floating. That means the central bank intervenes if the rupee is depreciating more than the expected level.
Traditionally Sri lanka is a country where you import more than exports. So there's always pressure on Sri lankan rupee. As I said if the rupee is deteriorating more than the expected level central bank intervenes and buy rupees from the market by selling dollars. But for this the central bank needs to have adequate dollar reserves.
There are pros and cons for devaluing the rupee. Its good for exporters like the people in the tea industry,etc. Our products will become more competitive in the international market. But on the other hand things like petrol, wheat floor will be more expensive as we import those from overseas.
If I am not mistaken, Sri lanka floated the rupee in Chandrika's regime.