I find myself betting “no” on Manifold a lot more than I bet “yes,” and it’s tended to be a profitable strategy. It’s common for questions on Manifold to have the form “Will [sensational event] happen by [date].” These markets have a systematic tendency to be too high. I’m not sure how much of this bias is due to Manifold users overestimating the probabilities of sensational, low-probability events, and how much of it is an artifact of markets being initialized at 50%.
I find myself betting “no” on Manifold a lot more than I bet “yes,” and it’s tended to be a profitable strategy. It’s common for questions on Manifold to have the form “Will [sensational event] happen by [date].” These markets have a systematic tendency to be too high. I’m not sure how much of this bias is due to Manifold users overestimating the probabilities of sensational, low-probability events, and how much of it is an artifact of markets being initialized at 50%.