I can sum up August 2015’s market performance for you in one word:
In the eight indexes I follow (plus crude and oil), only two were up during August: crude oil and gold.
The S&P 500 Index—the index I follow most closely and have the most data on—was down 6.03%. That was its worst August performance since 2002.
Year-to-date, everything is down except the Barclay’s Aggregate Bond Index.
You can see the results for yourself by downloading the latest PDF: S&P 500, MidCap 400, SmallCap 600, & 1500 Performance History (01-2011 – 08-2015)