US markets closed with very wide losses. The reaction of US investors was significant. Until yesterday, and as at similar times in the past, the US stock markets have always considered the Greek situation a European issue with limited potential to affect the US economy. However, given the high uncertainty that is spreading throughout the Eurozone, US investors fear that the modest European economic recovery is compromised, adversely influencing this quarter the attempted acceleration of the US economy. In a risk aversion context, the publication of economic data has been relegated to a lower plane. Technically, yesterday’s session is an important warning. Since late March, the S & P had fluctuated between 2067 and 2135, not showing any clear trend in the short term. Yesterday, the S & P broke the lower part of this range and may signal the beginning of a descending phase. This signal can be thwarted if the S & P back to close within that range.