We now have a reasonable number of polls out after the Democratic convention to get some sense of a convention bounce. Here's the trend chart for July, with the dates of the conventions superimposed over the chart. I marked the 'start' of each day. So they may little a narrower than they should be. But you get the idea.
For the full national horserace chart and data set click here.
As I said earlier, bounces often fade. But not always. Often they create a new baseline that drives the fall campaign. In any case, we'll need to wait about a week longer until we have a solid idea where we are as the fall campaign begins.