Indeed, I've read much concern over this area as oil collapsed so it does merit a warning. From ZeroHedge:
The S&P 500 Energy sector stocks are down over 12% year-to-date, tumbling over 3% today to fresh 20-month lows. The spread (or risk) of high-yield energy credits surged again today, breaking above 850bps for the first time... The overall high-yield credit market is being dragged wider by this contagion as hedgers try to contain the collapse that is possible. For now, the S&P 500 remains entirely ignorant of the fact that over a third of its CapEx was expected to come from this crushed sector...
According to DB
US private investment spending is usually ~15% of US GDP or $2.8trn now. This investment consists of $1.6trn spent annually on equipment and software, $700bn on non-residential construction and a bit over $500bn on residential. Equipment and software is 35% technology and communications, 25-30% is industrial equipment for energy, utilities and agriculture, 15% is transpor