ISLAMABAD : Pakistan's foreign exchange reserves dropped to $16.103 billion in the week ending May 11 from $16.416 billion the previous week, the State Bank said on Thursday. Reserves held by the State Bank of Pakistan (SBP) fell to $11.784 billion from $11.978 billion a week earlier, while those held by commercial banks dropped to $4.319 billion from $4.438 billion. Foreign exchange reserves hit a record $18.31 billion in July last year, boosted by inflows of $411 million, including a $191.9 million loan from the WB and a $196.8m loan from the ADB.