We present the results regarding the analysis of the fast X-ray/infrared (IR) variability of the black-hole transient MAXI J1535-571. The data studied in this work consist of two strictly simultaneous observations performed with XMM-Newton (X-rays: 0.7-10 keV), VLT/HAWK-I (K_{\rm s} band, 2.2 \mum) and VLT/VISIR (M and PAH2_2 bands, 4.85... Show more