Riverstone Energy (ticker: RSE) was launched in 2013 when it raised a chunky £760m at £10 per share. Its original aim was to invest exclusively in the global energy industry with a focus on the exploration, production, and midstream sub-sectors. Within a couple of years, RSE had built up a concentrated portfolio of around a dozen private investments and its NAV per share had risen to around £16. But as the 2010s drew to a close, weaker demand for oil eventually resulted in a series of NAV declines and then there was a further collapse in the oil price caused by the pandemic. The NAV dropped to...