The Q4 2015 Sentiment Index from Visible.vc indicates a decline in investor sentiment across all stages, particularly in the seed market, with fears of a long-term decrease in capital availability. Investors express concerns over company quality and funding challenges, leading to a power shift favoring investors, which may result in lower valuations and stricter funding conditions for early-stage companies. Despite recent downturns, investors maintain that high-quality companies will still secure funding across market cycles.