Clean energy is the future, but stocks aren't acting like it. Here's why.

• Clean energy stocks are some of the worst performing stocks this year, as high interest rates choke growth.
• The S&P Global Clean Energy ETF is down 34% year-to-date and companies like SolarEdge are down 70%.
• Still, clean energy investments continue to grow and investors expect performance to improve.

Despite growing calls for an accelerated global shift to clean energy, stocks in the sector vastly underperforming the broader market. In fact, they're some of the worst performers this year.