When international stock returns lag, investors may feel tempted to double down on their home market. Historical data suggests the long-term benefits of diversifying globally.
The notion that sellers can outnumber buyers on down days doesn’t make sense. The number of buyers must always equal the number of seller. What the newscasters should say, of course, is that prices adjusted lower because would-be buyers weren’t prepared to pay the former price.
I believe it is very difficult, if not impossible to predict the future, certainly over the long run. And, it's much less possible to make a profit from guessing the future.