Quote from talontrading:
Ok... as promised... here is a system that has an edge. I know this because 1) I backtested it rigorously and 2) i have used it for quite a while and made a good return with it.
Index Adds / Drops from S&P 500
On the days following an announcement that a stock will be added to the S&P 500, work a limit order to buy that stock at the settlement of the announcement day. If not filled, don't chase the market.
On days following an announcement of a drop from the S&P 500, work a limit order to short that stock at the settlement price of the announcement day.
On the close of the day that the change is actually effective, flip the position. If you were unable to fill on the limit order then get short the addition and get long the deleted stock.
If there is no offsetting position (for instance, an addition announced without a deletion) then "hedge" the position with equal dollars of SPY or futures (though you will be creating a taxation issue with futures.)
The portfolio is hence always long/short equal dollars. If you buy $100K of ABC and sell $100K of XKY on the announcement day the values might be +125K ABC and -112K XYZ on the effective date. Doesn't matter, on that day you then short 100K ABC and buy 100K XYZ.
Exit the trade 25 days after the effective change date.
Do not trade deletions due to corporate actions, takeovers, bankruptcies, etc.
Think long and hard about position sizing. There is no stop so theoretically the entire investment is at risk. I like to risk no more than 2% of my account on any trade, but that's really not possible here. Maybe allocate 15% of capital to each trade. Be aware that you can go many weeks with no positions or have on 4 positions at once.
That's it... do the work... it's hard to backtest because it's not like Buy when the 3 period XMA crosses over the 28 period SMA and the RSI is > 70 and ADX is < 15 or bullshit like that... those kinds of things don't tend to have a great edge, but here I have just given you a system that is supported by a vast body of academic research and works in real time.
Not one person here will do this for a year. Hard to believe but I would be wililng to bet.
I think my explanation is clear, but I think that because I wrote it lol. If it's not ask and I will attempt to clarify.