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hello everyone in previous videos we have discussed the derivation of the trainer black model in this one we are going to use Excel to implement it you are going to recall that the trainer black model seeks to construct an active portfolio of Securities and we are hoping that a combination of the active and passive portfolios will give us a better sharp ratio than the passive portfolio alone well what is the passive portfol folio the passive portfolio tracks the market and is supposed to be well Diversified we can use SNP 500 Index or any other market index as a proxy for our passive portfolio in this demonstration we are using the Samp;amp;P 500 Index the active portfolio would comprise of some Securities that have been selected from security analysis and hopefully they can provide us with some positive Alpha which of course as you will remember is going to come at the cost of introducing some residual variants because we are moving away from the well Diversified position in the pass
