There is always a bit of fear when evaluating buying in at all time highs. The sentiment is understandable. Everyone is afraid of buying in at a market peak and eating the recession that follows. After all, after almost a decade of uninterrupted growth, aren’t we due for a downturn?
However, the data analysis (done by someone else!) and existing scholars such as Tobias Moskowitz supports momentum investing. In other words, when the market or an individual stock is rising, it’s more likely than not to keep rising than to suddenly reverse.
Applied to current market highs, I would still encourage ordinary people to invest their new capital in accordance with prior allocation ratios, to achieve a healthy rebalance despite stock market highs. More likely than not, the market will be even higher (even after adjusting for inflation) in the next decade. If prior trends hold, we may be on the cusp of a 1-2 decade run of sustained all time highs.