Pakistani rupee remained almost flat against the US dollar in the interbank on Tuesday and recovered by one paisa. According to a tweet of the State Bank of Pakistan, the US dollar was opened at Rs 165.89 and closed at Rs 165.88. The US dollar gained 9 paisas during the last two days against Pakistani rupee. Meanwhile, the foreign reserves of the country stand at $19.90 billion as of September 18, 2020, said State Bank of Pakistan (SBP) in another tweet.