Energy issues are stronger on higher oil prices.

The decline in oil prices is a desirable scenario for exporter stocks.

A fall in US stocks was the impulse for the retreat.

This is a reverse from the recent trend of a stronger yen, which had been a concern. I think the stock market is feeling some relief.

There's concern about overheating ... After touching the goal of 16,000, it's now easy for investors to cash in their winnings.

It's hard to tell at this point if the Nikkei has reached a target or if it will climb higher.