The Negative Volume Index (NVI) changes only on days when volume falls, on the idea that the crowd trades on busy days while informed money acts on quiet ones. That is why NVI is often called a smart money index. This screen lists stocks on the London Stock Exchange whose NVI has just crossed above its 255-day signal line, a classic sign that quiet-day buying is turning positive. Confirm with the price trend or money flow before acting. LSE prices are quoted in pence, and the list skips thinly traded shares.