Tuesday's top analyst upgrades and downgrades included Airbnb, Charles Schwab, DraftKings, JPMorgan, Splunk, Synaptics, Uber Technologies and United Parcel Service.
Source: thinkstockHere are today’s five biggest gaining stocks at closing:Crossroads Systems Inc. (NASDAQ: CRDS) is up 32.1% at $3.85.OCZ Technology Group Inc. (NASDAQ: OCZ) is up 21.2% at...