PSX follows course of global equity markets after oil prices in international market fall by a third.
Sources say the SSGCL is expected to announce a schedule for CNG stations in the coming week.
After starting the day on a positive note, bears dominated the market as it closed at 40,655 points.
In the interbank market, the greenback traded at Rs157.78.
Greenback falls to Rs161 against the local currency in the open market during intraday trading.
According to some dealers, the greenback's value will hit Rs165 before the closing of the outgoing fiscal year.
Greenback traded at Rs163 in open market.
The greenback was being traded at about Rs157.5 in the open market.
The greenback's value strengthens to Rs152.95 in the interbank market.
Close of financial year, speculation termed main reason behind appreciating value.
The value of the greenback increases by Re0.75 in interbank and Re0.30 in the open market.
The dollar shed its value by Re1 in the open market to be traded at Rs148.50.
Value of the US dollar decreases by Rs1.70 in the interbank market.
The value of US dollar remains stable at Rs150 in the open market.
Buying by commercial banks reportedly powers the greenback's revival.
An emergency meeting of the PSX Board of Directors accepted Morin's resignation.
The greenback trades at Rs149.50 — down half a rupee from the Rs150 rate in the preceding session.
Rupee rises to Rs151.9 in interbank market and Rs153 in open market.
Greenback's value rises to Rs152.25 in interbank market.
The market closed at the loss of 155.77 points.