Many mutual fund investors are resigned to their fate as the market continues to be in a free-fall mode on the back of a slew of negative news: coronavirus scare, oil price war, YES Bank scam, and so on. However, some investors would be surprised to note that five mutual fund categories in their portfolio are shining brighter in these bleaker times. In fact, these mutual fund categories are offering double-digit returns. In some cases, very high double-digit, to be precise.