The key points from the document are: 1) Indian stock markets opened the July series on a subdued note due to concerns over Greece debt talks, with the Sensex closing down 84 points. 2) Key stock indexes like the Sensex, Nifty, Bank Nifty and India VIX ended lower, with banks, oil and metal stocks being the top losers. 3) The trend for the market was described as sideways, with 8300 seen as a strong support level for the Nifty and 8400-8490 as resistance levels.