Because these plans do not guarantee specific payouts in retirement, employers cannot be on the hook for future benefit gaps.

FORBES

People with a rare genetic form of Alzheimer's, whose specific genetic mutations guarantee that they will develop the disease, tended to show signs of amyloid plaques in PET scans and cerebrospinal fluid 10 to 20 years before the onset of symptoms.

CNN: Alzheimer's: Early detection, risk factors are crucial

However, few hedge funds in the world can guarantee a specific amount of downside protection.

FORBES: Building A Portfolio To Withstand Storms And Cliffs