When the market dropped in March of 2020, many equity investors ran for cover to the bond markets. While the bond rates were low, the thought was that it was better to get a low yield on bond investments rather than lose money from decreased equity prices.
After the economic crisis of 2008-09, the huge number of people employed in the construction business contracted severely. Many suffered long-term unemployment and consciously chose to look for work in less cyclical businesses. When the economy recovered, those workers were no longer available