@Tyrell Perry
If NOI/CAP rate = Value, the only variables to affect value are NOI and CAP rate. If your NOI remains constant, any change in value would have to be driven by CAP rate expansion or contraction.
Think of it this way: a CAP rate = the amount of return an investor could expect on a particular asset (assuming an unlevered, cash purchase). Typically, low risk = lower expected return, high risk = higher expected return.
In our example, we bought the asset with $10,000 NOI at a 10% CAP ($100,000 purchase price). We increase the NOI from $10k to $15k but only able to sell for $90k (16.6% CAP). Even though we've grown the NOI, due to declining market conditions the asset is considered "riskier" than it was when it was first acquired. Thus, an investor would expect a higher return in the declining market condition than the initial purchase. To see CAP rates move from 10% to 16%, it would take significant negative impactors in the local economy (i.e. job/industry loss, population decline, unemployment growth, etc.)
In essence, when it comes to commercial assets, the market condition IS the CAP rate. A stable, high growth market will command lower CAP rates, while a riskier, slow growth market will trade at higher CAP rates.
Hope this helps!