The seemingly never-ending stories of impropriety from the Banking Royal Commission has highlighted inherent risks in being overexposed to this sector, which a large number of investors are. Not only do Financial businesses (banks, insurers etc.) account for over one-third of the ASX200 Equity Index but they also comprise a massive 84% of the listed bond market as investors have been funnelled into bank-issued securities due to a lack of alternatives.
Properly diversifying your investment pool not only means diversification at an asset class level but also diversifying individual exposures at the security level.