I feel 18 out of 2 isn't a good enough statistic to say he is "just right twice a day".

What was the cost of the 16 missed predictions? Presumably he is up over all!

Also doesn't even tell us his false positive rate. If, just for example, there were 1 million opportunities for him to call a bubble, and he called 18 and then there were only 2, this makes him look much better at predicting bubbles.