The main concern to Iran's reaction isn't the U.S., but that Israel could decide to bomb the nuclear plant. Stability in the area depends on who's in charge in Israel.

I expect the oil market to remain tight for the rest of the year, so there will be resistance for prices to move lower. Markets are worried about the upside risks. Four refineries are still out and it will take time before production is up.

The market is nervous already because Iran is coming more into the picture with the talks with Russia next week. Now with Nigeria, the risks are getting higher. If we see any disruptions to oil production, prices could easily go back up.

Nigeria produces mostly the light, sweet crude oil for which there is more demand. With Iran, my main concern is that we won't see a solution for a while.

I expect both the UN and Iran not to want a confrontation, and therefore we don't get any clear decision on any action toward Iran at Monday's meeting at the IAEA. OPEC will keep their quotas unchanged at Wednesday's meeting due to the high crude prices.

As long as we don't have another storm coming into the Gulf, I expect oil prices to fall slightly. I also expect increased worry that high oil prices will have some impact on economic growth.

Nigeria's problems have escalated, with more incidents affecting crude-oil output. With Iran, my main concern is that we won't see a solution for a while and it will drag.

The inventory levels for crude in the U.S. are quite high, but everybody is concerned about gasoline ahead of the driving season. It looks like prices should go down but then you have the geopolitical issues coming up.