It is pretty crazy for an oil producer to invest their sovereign wealth fund in oil company stocks. There could be a further price decline in the future and you should want some of your wealth protected from that.
I recall my CFO boss at Weyerhaeuser who was fulling invested in Weyerhaeuser stock which hadn't gone anywhere for 18 years, and in fact declined.
It was a great place to work, but his unsealed 401k statement got routed to me by accident and for a guy close to retirement age it was really sad to see a $114k total to retire on.
Fortunately he was married to a film star's daughter.
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