The results from their latest survey are out, and Credit Suisse analyst Daniel Oppenheim writes in a note to clients that “the breadth of strength in both pricing and traffic at the start of spring selling season” is “unprecedented in [the] survey’s history (dating back to ’05).”

The data showed that prices rose in all 40 markets last month – the first time that’s ever happened in the history of the survey. Credit Suisse’s home price index, derived from the survey data, increased to 79.3 from 74.6 in January.

The strongest price increases were observed in California, Florida, Austin, Las Vegas, San Antonio, Seattle, Denver, and Phoenix, according to Oppenheim.

The buyer traffic index derived from survey data rose to 65.1 from 59.0. Oppenheim notes that “only Charleston, Orlando, and Tucson failed to meet agents’ expectations, while notable improvement was seen in the formerly-lagging Chicago and New York markets along Texas markets (Austin, Dallas, and Houston each increased by at least 14 points).”

Meanwhile, housing supply continues to fall and the length of time it takes to sell a home fell to a new low. Oppenheim says both of these factors point to further price gains this spring.