Traders’ return from summer holidays is a catalyst.

Though the market overall is reasonably valued, there are pockets of extraordinary risk in the technology sector.

State Street Corp. and Goldman Sachs Group Inc. are planning a series of ETFs with themes that would invest in everything from robotics to space to deep-sea exploration.

Bill Gross’s Janus Henderson Global Unconstrained Bond Fund ended July at $1.25 billion, down almost $1 billion from its peak in February.

That doesn’t mean they aren’t an ongoing problem.

It may be a long time before it brightens.

As investors seek fresh ways to bet on winners while guarding against turbulence, UBS is marketing structured debt products that give short-term exposure to cross-asset moves from currencies to bonds and stocks.