Reuters/Danish SiddiquiBefore markets open on Wednesday, here's what you need to know. Janet Yellen's Humphrey-Hawkins testimony begins. On Wednesday, Fed Chair Janet Yellen will appear before the House Financial Services Committee as part of her semi-annual Humphrey-Hawkins testimony on Capitol Hill. Yellen's prepared remarks will be released at 8:30 a.m. ET and Yellen's session before Congress will kick off at 10 a.m.