Pakistan, Jan. 23 -- The Pakistan Stock Exchange (PSX) witnessed another volatile trading session on Wednesday, as the indices changed directions all day long before closing in the negative zone.

Foreign investors closed the preceding session (Tuesday) as net buyers, with a net inflow of $0.901 million.

The KSE-100 Index marked its intraday low at 42,143.90 after losing 482.58 points. However, the cement sector came to the rescue in the latter half of the day, helping the index close slightly lower by 65.21 points at 42,561.27.

Sectors that drove the index south included oil and gas (-70.75 points), oil and gas marketing (-36.10 points) and tobacco (-36.10 points). On the other hand, cement (+57.53 points), fertilizer (+33.23 points) and...