UnitedHealth shares fell more than 6% on Wednesday after the UK's Guardian newspaper reported the company made secret payments to nursing homes to reduce hospital transfers, adding to the woes of the healthcare conglomerate.

Shares fell more than 4% after the UK’s Guardian newspaper reported that UnitedHealth made secret payments to nursing homes to reduce hospital transfers.

A Guardian investigation reveals UnitedHealth paid bonuses to nursing homes to reduce costly hospital transfers—allegedly at residents' expense. Whist