Yes I never thought about that. Apparently it might be searching posts in year 2013 and returning a page not found error. I tried _year=2013 and _year=2014 and it looks like working.
Thanks for the recommendation.
Hello,
I had the same issue in my website a couple of days ago. I was having “government bond fund” right next to my tagline. I cleaned up my website.
Could you figure out how you were hacked infoproducts?