I want to know the answer to the following question:
What do some call the effect that they say caused a one-day loss for stock exchanges of approximately $31 billion in the year 2000?
All the background I'm provided with is that "Although it has been argued that clock shifts correlate with decreased economic efficiency, and that in 2000 the daylight-saving effect implied an estimated one-day loss of $31 billion on US stock exchanges, the estimated numbers depend on the methodology.". Is that enough to answer the question?