Today’s large unusual volume in Microsoft Corp (MSFT) call options shows that some investors are bullish long-term on MSFT stock. The stock tanked after its Q3 earnings, so buying long-dated in-the-money calls is an easy way to play this. MSFT is at $416.44 in midday trading on Nov. 6, well off its price of $432.53 just before releasing its Q3 results on Oct. 30. These in-the-money call options buyers must believe that the stock’s drop has been overdone. This can be seen in today’s Barchart Unusual Stock Options Activity Report. It shows that the volume in these calls is over 52 times the prio…