What is Rollover Week on the PSX?
Rollover week is the final week of a PSX futures contract month, when traders close positions in the expiring Deliverable Futures Contract and reopen them in the next month. Prices and open interest often move mechanically during this window rather than on fundamentals.
How it works
Because PSX futures expire on the last Friday of each month, the preceding days concentrate forced activity: leveraged longs must fund delivery, roll at a cost, or sell. That selling pressure often depresses heavily positioned stocks into expiry, with relief once the roll completes.
Open interest readings are least trustworthy in this window — OI collapses in the expiring contract and rebuilds in the next month, so 'long unwinding' or 'fresh build-up' labels derived from day-over-day OI changes can be artifacts of the calendar.
Common questions
Why do some PSX stocks fall in rollover week?
Stocks with heavy futures open interest face forced selling as leveraged longs unwind or pay to roll positions before the last-Friday expiry. The pressure is calendar-driven and often eases after the roll completes.