JPMorgan’s Guide to the Market breaks down what’s cheap and what’s expensive now that we’re well into 2015 US equities are down slightly since the beginning of the year, and according to JPMorgan’s first quarter Guide to the Markets that came out this week stocks are fully valued compared to historical averages but not exactly high by most measures. Large-cap blend stocks cheapest valuations versus history If you compare PE multiple to the 20-year average, large-cap blend stocks (ie a mix of value and growth) are fairly valued at 16.3x compared to an average 16.1x while large value stocks have…