YC founders set their valuation terms and rarely negotiate, especially with non-lead investors. Attempting to do so is a major red flag that you don't understand the ecosystem's norms. The deal is typically 'take it or leave it,' as founders have often already taken money at those terms.

A compressed diligence process relies heavily on projections. A superior approach is building a relationship over 1-2 years, which allows an investor to witness the company's actual execution against its stated goals, providing far greater conviction than any financial model.

YC's program for students isn't just about flexibility; it's a strategy to track promising founders for years. By encouraging repeat applications, YC gathers longitudinal data on a founder's evolution, thinking, and progress, de-risking the eventual investment by observing their entire pre-founding journey.

YC now provides founders an investor's conversion rate (meetings vs. checks). A low rate signals to founders not to prioritize that meeting, forcing VCs to abandon a "catch-all" meeting approach in favor of being highly selective upfront to avoid damaging their reputation within the ecosystem.

Unlike typical fundraising environments, YC Demo Day flips the power dynamic. YC was created to empower founders, so investors must understand they are competing for a chance to invest. Approaching founders with a sense of entitlement is a critical mistake.

Rounds for top YC companies often close within 2-3 days of Demo Day. Investors who delay follow-ups by even a few days will miss out. Successful investors book meetings for the next day on the night of Demo Day to stay competitive.

Engaging with founders a month before Demo Day, even without a formal pitch, provides a vital baseline. Witnessing their spectacular progress over that month creates a powerful second data point on execution velocity, making the investment decision far easier and more informed.

There's a common misconception that all YC rounds close on Demo Day. In reality, many excellent companies are still raising capital afterward. Persistent and helpful investors can still secure an allocation in the days and weeks following the event, or position themselves for the next round.

At YC Demo Day, a verbal or email agreement to invest is a binding commitment. Backing out will severely damage your reputation within the YC ecosystem, as investor behavior is tracked and formally rated by founders in a private database.