Rupiah Strengthens to Rp14,891 Posted by yosefardi.com | Sep 6, 2018 | News Group The rupiah has strengthened to Rp14,891 against the US dollar at midday, from Rp14,927 on Wednesday, expectedly helped by intervention by central bank (Bank Indonesia/BI). Per Wednesday, BI has intervened in forex market for Rp11.9 trillion.