The last full week of September will introduce volatility to markets. Fund managers will dress up their holdings, dumping losers and buying winners. Expect volatility raising prices of call/put options.October approaches. Will the month bring in the usual losses like it does in most years?Watch:$ROKU: $ROKU, Roku, Inc. / H1 $ULTA: $ULTA, Ulta Beauty, Inc. / H1 $AMD: $AMD, Advanced Micro Devices, Inc. / H1 $MCD holding up, but barely: $MCD, McDonald's Corporation / H1