Sector and thematic funds, which delivered high returns when the equity market was in a bullish phase, have witnessed sharp declines amid the recent market correction. Public-sector unit (PSU) funds, which delivered 49 per cent over the past year, are down 8.9 per cent over the past month. Infrastructure funds (40 per cent and 8.3 per cent) and consumption funds (28.3 per cent and 9.7 per cent), which also delivered high returns over the past year, have caused erosion of investor wealth over the past month.