Sure. Bullish prognosis so go long 80/85 aapl feb call spread.
aapl falls to 75.
prognosis now bearish.
adjustment: sell the 75/85 call spread, i.e. buy back the short 85 and sell the 75.
result is a 75/80 bear call spread or, as you like to put it Bob, 'delta negative'.
Easy, took just one...