Put Back Spreads
are excellent strategies when you are expecting a big downward movement in an
already volatile stock. The strategy involves selling a put at a higher strike
price and buying a greater number of puts at a lower strike price.
Ideally
this strategy will be initiated for a minimal debit or possibly a small credit.
So if the stock gains ground you wont suffer much either way. If the stock drops
the profit potential will be significant as you have more long puts than short.
To maximize profit from this strategy many traders use in the money options as
they have a higher chance of finishing in the money at expiration.
Example:
Using QQQ the Nasdaq 100 Index we can create a put back spread using in the
money options. With QQQ trading at $30, you might buy 2 of the $30 Puts at $1.25
and selling one $32.5 Put at $2.70.
In
this trade we would receive a credit of $20 ($270 - $250). If the stock goes
above $30 you would profit $20. However, the good money is made if the stock
made a large move down. The downside breakeven is $27.50, at this price the 30
puts would be worth $2.50 each and the 32.5 put would be worth $5. Below $27.50
the profit potential growth is unlimited.

Using ShareCharts
Option Strategies for Put Back Spread the entire transaction can be seen
clearly. Go to Derivatives < Option Strategies and select Put Back Spread
from the ‘Strategy’ Drop Down Box. Enter in all relevant parameters and
click ‘Update’ to view the chart.