With the yen at a 40-year low, here's when Japan could intervene to catch the market off balance
By Jules RimmerJapan's finance ministry may look to exploit low trading volumes over the U.S. holiday to push its currency higherThe Japanese yen hit a 40-year low on Tuesday.With the Japanese yen reaching a 40-year low on Tuesday, investors are eyeing when the country's authorities may stage an in…