BoJ Intervention Tactics Criticized for Being Too Predictable

The Bank of Japan's (BoJ) intervention tactics have been criticized for being too predictable and ineffective in managing volatility in the currency market. The Ministry of Finance's warnings about unwarranted moves are often seen as lacking credibility due to over-dramatization.

In contrast, central banks like the Bundesbank were feared for their unpredictability and ability to make a big impact on the market with minimal warning. The BoJ could learn from this approach by becoming more frequent participants in the market using different tactics, such as varying the time of day and size of interventions.

However, Japan's retail investors rely on carry trades, which makes it difficult for the MoF to control the market. A possible solution would be for the BoJ to use smaller, repeated doses of intervention to inflict pain on buyers, creating uncertainty and slowing down market activity.