Getting new products out early is a big factor in being profitable and winning in this industry.

The price was expensive and the decision to raise it 23 percent came as a surprise. The sale took place when most investors had already added sufficient banking stocks to their portfolios so they don't have strong reasons for buying.

Investors are confident the dollar will remain strong against the yen for the time being on the prospect that the Fed will continue to raise interest rates. That view lured money into technology stocks that are sensitive to currency fluctuation.

Money is gathering into the real-estate business. The trend will help boost profits of property companies and banks.

It's inevitable that the surge in oil prices we're seeing now will eventually affect growth. The production report does raise concern that a recovery will be delayed a bit.

Good news from the U.S. is pushing shares at home higher. What's driving foreign investors is the view deflation may soon end and foreign buying will probably continue.

Banks' earnings reaffirmed that Japan's economic fundamentals are strong. Selling by overseas investors may continue for another month or so and that is limiting the gains.