New Financial Activity Indexes: Early Warning System for Financial Imbalances in Japan

Yuichiro Ito, Tomiyuki Kitamura, Koji Nakamura and Takashi Nakazawa
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Yuichiro Ito: Bank of Japan
Tomiyuki Kitamura: Bank of Japan
Koji Nakamura: Bank of Japan
Takashi Nakazawa: Bank of Japan

No 14-E-7, Bank of Japan Working Paper Series from Bank of Japan

Abstract: This paper describes Financial Activity Indexes (FAIXs), early warning system for financial imbalances in Japan. We introduced the first version of FAIXs in 2012 and revise FAIXs this time. First, we sort the candidate financial indicators into 14 categories. Second, in each category, we examine the usefulness of candidate indicators from two perspectives: (a) whether the indicator can detect the overheating of financial activities in the Japan's Heisei bubble period, which occurred around the late 1980s and had a major impact on Japan's economy and financial activities; and (b) whether the indicator successfully minimizes various statistical errors involved in forecasting future events. In the examination, multiple possibilities are explored with respect to methods used for extracting trends from indicators and thresholds employed for assessing that the deviation of an indicator from its trend constitutes overheating. As a result of choosing the one indicator considered most useful in each category, two of the ten financial indicators comprising the existing FAIXs are abandoned, one is retained, three are revised in terms of trend extraction methods, and four are revised in terms of data processing methods. The 14 indicators, including these eight and six newly selected, now constitute the new FAIXs.

Date: 2014-04-23
New Economics Papers: this item is included in nep-ban
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