Imagine that I am going to buy a membership from one of these company. But I couldnt decide which one has the true market data. I need volatility,call-put prices, deltas and some stuffs about currency options. Some people told me Blooomberg and Reuters' data is not good, the data they are providing is very different from the actual value of the volatility.
Please help me about that subject. Which one do I have to prefer?
Please help me about that subject. Which one do I have to prefer?