Why do Investors Care?
Since the economic backdrop is the most pervasive influence on financial markets, construction spending has a direct bearing on stocks, bonds and commodities. In a more specific sense, trends in the construction data carry valuable clues for the stocks of home builders and large-scale construction contractors. Commodity prices such as lumber are also very sensitive to housing industry trends.

Businesses only put money into the construction of new factories or offices when they are confident that demand is strong enough to justify the expansion. The same goes for individuals making the investment in a home. That's why construction spending is a good indicator of the economy's momentum.