An 8% plunge in the high-flying U.S. chip stock index on Tuesday marked a jarring injection of volatility into mid-year trading. Memory chipmaker Micron Technology fell around 13%, reversing all its gains from the day before, ahead of its earnings update today. For an index that had doubled so far this year, maybe it just ran out of steam, but the 10% retreat in South Korea’s chip-heavy and volatile KOSPI earlier in the day won’t have helped either. SoftBank CEO Masayoshi Son thinks it’s…
