Foreign investors heavily bought into Japanese stocks in the week to Aug. 10, encouraged by policymakers' signals to stabilize the market following recent turmoil which had sent shares into their biggest one-day plunge since 1987. Cross-border investors bought a net 521.9 billion yen ($3.51 billion) of Japanese shares in the week, reversing three consecutive weeks of net selling, according to finance ministry data. Last week, Japanese policymakers signalled action to prevent further declines in the stock market, while the Bank of Japan indicated it would keep rates steady amid market instability, following a historic 12.4% drop in the Nikkei share average on Aug. 5 on fears of a recession in...