Market ‘going to get less good’: Mark Fisher

While the stock market isn't necessarily headed lower in the near term, now isn't the time to go all in, Mark Fisher of MBF Clearing said Friday.

"Obviously, the dynamics of the market is there's no place else to put money," he said. "To be honest with you, I've been underinvested the whole way up, as well. I'm just like everybody else.

(Read more: How the market gets to new highs: Dan Nathan)

"But the interesting thing about the real long-term money in the market is this: When things are bad and things get less bad, that's the time to put everything in. And it's a little fearful to do it."

On CNBC's "Fast Money," Fisher said that market conditions were "now good" but "going to get less good."

(Read more: 5-star fund manager: Stick with retail stocks)

"I'm not saying the market's going to go down, but if was someone that, you know, was sitting on the sidelines, I don't think this is really the time that I would just plow everything on in," he added.

The reason?

"Because there's just too much uncertainty," Fisher said, citing the federal debt-ceiling debate in Washington, the geopolitical crisis in Syria and "unwinding of QE everything."

— By CNBC's Bruno J. Navarro. Follow him on Twitter @Bruno_J_Navarro.

Trader disclosure: On Sept. 13, 2013, the following stocks and commodities mentioned or intended to be mentioned on CNBC's "Fast Money" were owned by the "Fast Money" traders: Stephen Weiss is long AAPL CALLS; Stephen Weiss is long BAC; Stephen Weiss is long C; Stephen Weiss is long FB; Stephen Weiss is long C; Stephen Weiss is long TBF; Stephen Weiss is long MOS; Pete Najarian is long AAPL; Pete Najarian is long C; Pete Najarian is long MS; Pete Najarian is long INTC; Pete Najarian is long BBRY; Pete Najarian is long SBUX; Pete Najarian is long FB; Joe Terranova is long VRTS; Joe Terranova is long MOS; Joe Terranova is long OXY; Joe Terranova is long APA; Joe Terranova is long MS; Joe Terranova is long GS; Joe Terranova is long SBUX; Joe Terranova is short XBI; Mark Fisher owns CVX; Mark Fisher owns HES; Mark Fisher owns MPC; Mark Fisher owns PSX; Mark Fisher owns VLO; Mark Fisher owns ABX; Mark Fisher owns EGO; Mark Fisher owns GDX.