Indonesia's most aggressive rate tightening in eight years has barely dented a current account deficit, prompting calls for more increases and other measures before the Federal Reserve cuts stimulus.

Bank Indonesia has raised borrowing costs by 1.75 percentage points to 7.5 per cent since early June, the quickest since 2005.

Following data which recently showed the country recorded its second-highest current account shortfall on record in the three months through September, JPMorgan Chase & Co and Standard Chartered now see a further 50 basis points of increases in the first half of next year.

Foreign funds pulled US$3.8 billion from Indonesian stocks and local currency bonds in June after the Fed said it could cut stimulus, and a lack of progress on improving the current account before the US does eventually taper leaves the country vulnerable to another sudden outflow.