Poor market sentiment also affects M&A. I remember from my banking days in 2008, where one of my clients with $2 billion in cash wouldn't even fork over $100 million to acquire a company at 9x revenue with 80% revenue growth.
So over all exit options are appearing less attractive for VCs, thus they're likely to fund less companies at lower valuations.
Also check out Fred Wilsons response (http://www.avc.com/a_vc/2012/06/some-perspective.html). He makes some good points about the returns still being pretty damn good.
That will make it harder for the B-Grade VC companies to raise money, which will reduce the valuations anyone else has to pay to invest.
That has the potential to drive hundreds of millions of dollars into the angel space overnight, sending valuations through the roof or at least keeping them propped up for a while.
Not really. The crazy valuations were typically occurring when VC's got involved at the A round or later - not when early stage investors are working. A lot of early stage investing is done using convertible notes anyway.
When VCs are worried that they won't ever get a multi-billion dollar IPO to cash in and thus generate returns they will be forced to get the same junk of any given start-up for less money in order to create the the same return factor.
Anyone correct me if I'm wrong.