The National Federation of Independent Business (NFIB) released its Small Business Optimism US Index today indicating it has decreased to 91.2 in August. This breaks the improving trend since dropping to a multi-year low in March. interested in a loan. NFIB Optimism index has remained below its 50-year average for the past 32 consecutive months. Read in this Weekly Update our assessment of this report and the future of small businesses in America.