Quote from riskarb:
Legged within seconds. Nobody would offer a long time spread or a long call[put] fly at a credit, but all positions were locked within seconds... a minute, tops. There was little or no need to hedge deltas in spot, as the arbs were identified before the trades took place. Most scenarios appeared during the net/telecom bubble.
Quote from cnms2:
So basically you're a good trader and know how to trade yourself into positive expectancy. Congratulations! This is not an easy feat for beginners and intermediate level traders. I guess that even for you some trades don't work, but your money management rules protect you.
Riskarb,
First, I guess I should have expressed myself more clearly. What I meant to say is that, generally, there are no risk-free trades.
Second, even though the trades were completed within seconds it doesn't mean that they were risk-free, you still had some risk while the other leg was being executed. It might have been a very low risk, but still a risk. Please, this is not meant to be an argument starter, I completely understand what you're talking about and agree that these things are possible, but as cnms2 mentioned this is not something a beginner can easily do so for beginners it is valid to say that there're no risk-free trades.
Cheers.