SAN FRANCISCO (KRON) – On today’s edition of Rob Black’s Winners and Losers, our financial expert Rob Black and KRON 4’s Mark Danon talk about Yahoo, Airbnb and retirement.

Yahoo is seeking bidders for about 3,000 of its patents, with hopes of raising about $1 billion on the sale. The struggling Net company has sent letters to a group of possible buyers of the patents.

San Francisco legislators approved tougher rules for Airbnb.

Workers are retiring later in life. About 1 in 4 people want to work till they are 70 years old.