Fermium (Fm) is a synthetic, radioactive element, and it's very difficult to study its chemistry due to its short half-life and limited availability. As a result, there is no definitive experimental confirmation of common oxide formulas for fermium.

However, based on its position in the periodic table (an actinide), it's reasonable to predict that fermium would likely form oxides with similar stoichiometry to other actinides. This means it could potentially form oxides like:

* FmO (Fermium(II) oxide)

* FmO₂ (Fermium(IV) oxide)

It's important to remember that this is purely theoretical, and further research is needed to confirm the existence and properties of fermium oxides.