Bank Indonesia will hike its key policy rate by 25 basis points on Wednesday, according to a slim majority of economists in a Reuters poll who said the weak rupiah could lead the central bank to tighten policy.The rupiah, already under pressure from concerns about fiscal management and central bank independence before the U.S.-Israeli war with Iran began on February 28, has dropped around 5 per cent since the conflict started, despite regular BI intervention in exchange markets, prompting economists to expect tighter policy. [...]