The Morningstar Definition of the Global Flexible Bond category with the Bloomberg Global Aggregate TR index as the respective category index is as follows:
Global Flexible Bond funds have the flexibility to invest across a range of bond types and can exhibit significant risk concentrations. Such concentrations may include, but are not limited to, large exposures to non-investment grade and emerging-markets debt. The funds may take unlimited foreign currency exposure as part of their investment program.
Obviously, this wide definition leads to a diverse set of funds and strategies claiming flexibility.
The Invesco Global Flexible Bond Fund invests in the full spectrum of the (UCITS compliant) fixed income universe, selecting from a broad array of security types within the global fixed income market. The fund seeks to generate a higher level of alpha than traditional global aggregate approaches by allocating with conviction across currencies, rates and credit sectors.