France-based minerals solutions producer Imerys revised its 2019 guidance downward for a second time this year, mirroring the manufacturing sector's weakness year-to-date and possibly going forward. CEO Conrad Keijzer unexpectedly resigned after 18 months in office. We now forecast an adjusted funds from operations (FFO) to debt of about 25% in 2019, compared with the rating commensurate level at about 30%. This follows adjusted FFO to debt of only 23% in 2018, mostly linked to exceptional items. We are therefore placing our 'BBB' rating on Imerys on CreditWatch with negative implications, reflecting that we could downgrade Imerys to 'BBB-' in the next three to six months, unless we foresee recovery in the market and the group's performance, alongside management's actions